Variable | Year | Supplement |
---|---|---|
ASINHELP | 2018 | Sample adult questionnaire |
ASINHELP | 2017 | Sample adult questionnaire |
ASINHELP | 2016 | Sample adult questionnaire |
ASINHELP | 2015 | Sample adult questionnaire |
ASINHELP | 2014 | Sample adult questionnaire |
ASINHELP | 2013 | Sample adult questionnaire |