Variable | Year | Supplement |
---|---|---|
COVCONF | 2018 | Family file |
COVCONF | 2017 | Family file |
COVCONF | 2016 | Family file |
COVCONF | 2015 | Family file |
COVCONF | 2014 | Family file |
COVCONF | 2013 | Family file |
COVCONF | 2012 | Family file |
COVCONF | 2011 | Family file |