| Variable | Year | Supplement |
|---|---|---|
| EXBTHCAR | 1993 | AIDS knowledge and attitudes |
| HLTHWORK | 1995 | AIDS knowledge and attitudes |
| HLTHWORK | 1994 | AIDS knowledge and attitudes |
| WHY12U06 | 1999 | Sample adult questionnaire |
| WHY12U06 | 1998 | Sample adult questionnaire |
| WHY12U06 | 1997 | Sample adult questionnaire |