| Variable | Year | Supplement |
|---|---|---|
| INWHOSN4 | 1996 | Health insurance |
| INWHOSN4 | 1995 | Health insurance |
| INWHOSN4 | 1994 | Health insurance |
| INWHOSN4 | 1993 | Health insurance |
| PL4PLREC | 1989 | Health insurance |
| WHONAM4 | 2003 | Person (core questionnaire) |
| WHONAM4 | 2002 | Person (core questionnaire) |
| WHONAM4 | 2001 | Person (core questionnaire) |
| WHONAM4 | 2000 | Person (core questionnaire) |
| WHONAM4 | 1999 | Person (core questionnaire) |
| WHONAM4 | 1998 | Person (core questionnaire) |
| WHONAM4 | 1997 | Person (core questionnaire) |