Variable | Year | Supplement |
---|---|---|
WRKDIR | 2018 | Sample adult questionnaire |
WRKDIR | 2017 | Sample adult questionnaire |
WRKDIR | 2016 | Sample adult questionnaire |
WRKDIR | 2015 | Sample adult questionnaire |
WRKDIR | 2014 | Sample adult questionnaire |
WRKDIR | 2013 | Sample adult questionnaire |
WRKDIR | 2012 | Sample adult questionnaire |
WRKDIR | 2011 | Sample adult questionnaire |
WRKDIR | 2010 | Sample adult questionnaire |
WRKDIR | 2009 | Sample adult questionnaire |