| DIBPRE |
2006 |
Sample adult questionnaire |
| DIBPRE1 |
2015 |
Sample adult questionnaire |
| DIBPRE1 |
2014 |
Sample adult questionnaire |
| DIBPRE1 |
2013 |
Sample adult questionnaire |
| DIBPRE1 |
2012 |
Sample adult questionnaire |
| DIBPRE1 |
2011 |
Sample adult questionnaire |
| DIBPRE1 |
2010 |
Sample adult questionnaire |
| DIBPRE1 |
2009 |
Sample adult questionnaire |
| DIBPRE1 |
2008 |
Sample adult questionnaire |
| DIBPRE1 |
2007 |
Sample adult questionnaire |
| DIBPRE2 |
2018 |
Sample adult questionnaire |
| DIBPRE2 |
2017 |
Sample adult questionnaire |
| DIBPRE2 |
2016 |
Sample adult questionnaire |