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