| EDUC |
2003 |
Person (core questionnaire) |
| EDUC |
2002 |
Person (core questionnaire) |
| EDUC |
2001 |
Person (core questionnaire) |
| EDUC |
2000 |
Person (core questionnaire) |
| EDUC |
1999 |
Person (core questionnaire) |
| EDUC |
1998 |
Person (core questionnaire) |
| EDUC |
1997 |
Person (core questionnaire) |
| EDUC1 |
2018 |
Person (core questionnaire) |
| EDUC1 |
2017 |
Person (core questionnaire) |
| EDUC1 |
2016 |
Person (core questionnaire) |
| EDUC1 |
2015 |
Person (core questionnaire) |
| EDUC1 |
2014 |
Person (core questionnaire) |
| EDUC1 |
2013 |
Person (core questionnaire) |
| EDUC1 |
2012 |
Person (core questionnaire) |
| EDUC1 |
2011 |
Person (core questionnaire) |
| EDUC1 |
2010 |
Person (core questionnaire) |
| EDUC1 |
2009 |
Person (core questionnaire) |
| EDUC1 |
2008 |
Person (core questionnaire) |
| EDUC1 |
2007 |
Person (core questionnaire) |
| EDUC1 |
2006 |
Person (core questionnaire) |
| EDUC1 |
2005 |
Person (core questionnaire) |
| EDUC1 |
2004 |
Person (core questionnaire) |