Variable | Year | Supplement |
---|---|---|
MODLONGD | 2003 | Sample adult questionnaire |
MODLONGD | 2002 | Sample adult questionnaire |
MODLONGD | 2001 | Sample adult questionnaire |
MODLONGD | 2000 | Sample adult questionnaire |
MODLONGD | 1999 | Sample adult questionnaire |
MODLONGD | 1998 | Sample adult questionnaire |