Aantal beantwoorde vragen 2001-2021
| jaar | aantal |
| 2001 | 310 |
| 2002 | 2693 |
| 2003 | 6483 |
| 2004 | 6881 |
| 2005 | 5189 |
| 2006 | 3216 |
| 2007 | 3585 |
| 2008 | 2857 |
| 2009 | 2635 |
| 2010 | 1878 |
| 2011 | 1806 |
| 2012 | 1839 |
| 2013 | 1730 |
| 2014 | 1821 |
| 2015 | 1882 |
| 2016 | 1694 |
| 2017 | 1208 |
| 2018 | 1270 |
| 2019 | 1061 |
| 2020 | 1650 |
| 2021 | 322 |
| totaal | 52010 |