Variable | Year | Supplement |
---|---|---|
PLNPAY64 | 2003 | Person (core questionnaire) |
PLNPAY64 | 2002 | Person (core questionnaire) |
PLNPAY64 | 2001 | Person (core questionnaire) |
PLNPAY64 | 2000 | Person (core questionnaire) |
PLNPAY64 | 1999 | Person (core questionnaire) |