Variable | Year | Supplement |
---|---|---|
INCGRP | 2020 | In both sample adult and child questionnaires |
INCGRP | 2019 | In both sample adult and child questionnaires |
INCGRP2 | 2013 | Family file |
INCGRP2 | 2012 | Family file |
INCGRP2 | 2011 | Family file |
INCGRP2 | 2010 | Family file |
INCGRP2 | 2009 | Family file |
INCGRP2 | 2008 | Family file |
INCGRP2 | 2007 | Family file |
INCGRP4 | 2018 | Family file |
INCGRP4 | 2017 | Family file |
INCGRP4 | 2016 | Family file |
INCGRP4 | 2015 | Family file |
INCGRP4 | 2014 | Family file |