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BHPS Documentation and Questionnaires

ahlprbaHealth problems: Arms, legs, hands, etc
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0788276.877.0
Probs arms or legs1234922.923.0
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbbHealth problems: Sight
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0948592.492.7
Difficulty seeing17467.37.3
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbcHealth problems: Hearing
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0944692.092.3
Difficulty hearing17857.67.7
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbdHealth problems: Skin conditions/allergy
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0918389.589.8
Skin conds, allergie1104810.210.2
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbeHealth problems: Chest/breathing
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0917189.489.6
Chest, breathing pro1106010.310.4
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbfHealth problems: Heart/blood pressure
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0902888.088.2
Heart and blood1120311.711.8
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbgHealth problems: Stomach or digestion
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0966694.294.5
Stomach, liver, kidn15655.55.5
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbhHealth problems: Diabetes
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned01005297.998.3
Diabetes11791.71.7
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbiHealth problems: Anxiety, depression, etc
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0970394.594.8
Anxiety, depression15285.15.2
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbjHealth problems: Alcohol or drugs
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned01018999.399.6
Alcohol, drugs142.4.4
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbkHealth problems: Epilepsy
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned01016299.099.3
Epilepsy169.7.7
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprblHealth problems: Migraine
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0943791.992.2
Migraine freq hdache17947.77.8
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ahlprbmHealth problems: Other
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not mentioned0971794.795.0
Other15145.05.0
Missing or wild-933.3Missing
Valid cases10231Missing cases33
Question RouteUses AHLPRB AHLPRB1 AHLPRB2 AHLPRB3 AHLPRB4 from Record AINDRESP
Index TermsHealth: Personal Health Condition
NoteSee note for AHLPRB.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


aj2payiImputation flag - AJ2PAY (base)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed06896.7100.0
Var Missing or wild-923.2Missing
Var Inapplicable-8909188.6Missing
Var Proxy resp-73523.4Missing
Var Refused-232.3Missing
Var Don't Know-177.8Missing
Valid cases689Missing cases9575
Index TermsEmployment: Second Job
Employment: Wages, Salary and Deductions
Imputation Flag Variable
NoteSee notes for variable AJ2PAY and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyrdiiImputation flag - AFIYRDI (base)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0938991.5100.0
Var Missing or wild-922.2Missing
Var Proxy resp-73523.4Missing
Var Refused-22962.9Missing
Var Don't Know-12052.0Missing
Valid cases9389Missing cases875
Index TermsImputation Flag Variable
Incomes: Rents, Savings, Investments
NoteSee notes for variable AFIYRDI and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


aprfitbiImputation flag - APRFITB (base)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed02702.6100.0
Var Missing or wild-94.0Missing
Var Inapplicable-8991296.6Missing
Var Refused-224.2Missing
Var Don't Know-154.5Missing
Valid cases270Missing cases9994
Index TermsImputation Flag Variable
Incomes
NoteSee notes for variable APRFITB and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


apayguiImputation flag - APAYGU (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0461945.089.4
Imputed15455.310.6
Var Inapplicable-8474846.3Missing
Var Proxy resp-73523.4Missing
Valid cases5164Missing cases5100
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable APAYGU and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


apaynuiImputation flag - APAYNU (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0461945.089.4
Imputed15455.310.6
Var Inapplicable-8474846.3Missing
Var Proxy resp-73523.4Missing
Valid cases5164Missing cases5100
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable APAYNU and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


apaygtiImputation flag - APAYGTY (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0503149.085.4
Imputed18628.414.6
Var Inapplicable-8401939.2Missing
Var Proxy resp-73523.4Missing
Valid cases5893Missing cases4371
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable APAYGTY and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


apaygliImputation flag - APAYGLY (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0476046.481.0
Imputed1111810.919.0
Var Inapplicable-8403439.3Missing
Var Proxy resp-73523.4Missing
Valid cases5878Missing cases4386
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable APAYGLY and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


apayntiImputation flag - APAYNTY (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0503149.085.4
Imputed18628.414.6
Var Inapplicable-8401939.2Missing
Var Proxy resp-73523.4Missing
Valid cases5893Missing cases4371
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable APAYNTY and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


apaynliImputation flag - APAYNLY (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0476046.481.0
Imputed1111810.919.0
Var Inapplicable-8403439.3Missing
Var Proxy resp-73523.4Missing
Valid cases5878Missing cases4386
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable APAYNLY and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ajsprofiImputation flag - AJSPROF (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
inapplicable-8937091.29Missing
proxy-73523.43Missing
Not Imputed02722.6550.18
Imputed12702.6349.82
Total10264100.00
Valid cases542Missing cases9722
Index TermsEmployment: Self-Employment
Employment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable AJSPROF and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


ajspaygiImputation flag - AJSPAYG (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed01481.464.6
Imputed181.835.4
Var Inapplicable-8968394.3Missing
Var Proxy resp-73523.4Missing
Valid cases229Missing cases10035
Index TermsEmployment: Self-Employment
Employment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable AJSPAYG and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimnpiImputation flag - AFIMNP (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed01011598.598.5
Imputed11491.51.5
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Benefits and Allowances and Pensions
NoteSee notes for variable AFIMNP and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimnbiImputation flag - AFIMNB (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0949592.592.5
Imputed17697.57.5
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Benefits and Allowances and Pensions
NoteSee notes for variable AFIMNB and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimniiImputation flag - AFIMNI (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0971894.794.7
Imputed15465.35.3
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Rents, Savings, Investments
NoteSee notes for variable AFIMNI and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimntiImputation flag - AFIMNT (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed01018399.299.2
Imputed181.8.8
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes
NoteSee notes for variable AFIMNT and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimnnliImputation flag - AFIMNNL (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0895687.387.3
Imputed1130812.712.7
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes
NoteSee notes for variable AFIMNNL and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimnliImputation flag - AFIMNL (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0927790.490.4
Imputed19879.69.6
Valid cases10264Missing cases0
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable AFIMNL and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afimnthiImputation flag - AFIMN (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0821580.080.0
Imputed1204920.020.0
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes
NoteSee notes for variable AFIMN and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyrliImputation flag - AFIYRL (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0891386.886.8
Imputed1135113.213.2
Valid cases10264Missing cases0
Index TermsEmployment: Wages, Salary and Deductions
Imputation Flag Variable
Incomes
NoteSee notes for variable AFIYRL and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyrnliImputation flag - AFIYRNL (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0895687.387.3
Imputed1130812.712.7
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes
NoteSee notes for variable AFIYRNL and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyrpiImputation flag - AFIYRP (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed01011598.598.5
Imputed11491.51.5
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Benefits and Allowances and Pensions
NoteSee notes for variable AFIYRP and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyrbiImputation flag - AFIYRB (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0949592.592.5
Imputed17697.57.5
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Benefits and Allowances and Pensions
NoteSee notes for variable AFIYRB and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyrtiImputation flag - AFIYRT (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed01018399.299.2
Imputed181.8.8
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Benefits and Allowances and Pensions
NoteSee notes for variable AFIYRT and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyriiImputation flag - AFIYRI (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0971894.794.7
Imputed15465.35.3
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Rents, Savings, Investments
NoteSee notes for variable AFIYRI and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afiyeariImputation flag - AFIYR (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0788276.876.8
Imputed1238223.223.2
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes
NoteSee notes for variable AFIYR and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


asppaygiImputation flag - ASPPAYG (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0376536.786.1
Imputed16065.913.9
Var Inapplicable-8589357.4Missing
Valid cases4371Missing cases5893
Index TermsEmployment: Labour Force Status
Employment: Wages, Salary and Deductions
Imputation Flag Variable
NoteSee notes for variable ASPPAYG and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18


afihhmniImputation flag - AFIHHMN (derived)
Record TypeAINDRESP
QuestionnaireDerived Variable
Value LabelValueFrequency%Valid %
Not Imputed0607459.259.2
Imp. part indiv Incm1287228.028.0
Imp. full indiv Incm2131812.812.8
Valid cases10264Missing cases0
Index TermsImputation Flag Variable
Incomes: Household Income
NoteSee notes for variable AFIHHMN and notes on imputation in Vol. A.
Variable OccurrenceW1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18