| jaar | vangst | kwijt | verschil |
| 1991 | 35 | 31 | 4 |
| 1992 | 25 | 9 | 16 |
| 1993 | 11 | 10 | 1 |
| 1994 | 13 | 6 | 7 |
| 1995 | 1 | 0 | 1 |
| 1996 | 0 | 0 | 0 |
| 1997 | 3 | 8 | -5 |
| 1998 | 9 | 6 | 3 |
| 1999 | 24 | 3 | 21 |
| 2000 | 28 | 5 | 23 |
| 2001 | 27 | 3 | 24 |
| 2002 | 4 | 2 | 2 |
| 2003 | 0 | 0 | 0 |
| 2004 | 3 | 0 | 3 |
| 2005 | 2 | 4 | -2 |
| 2006 | 3 | 7 | -4 |
| 2007 | 7 | 8 | -1 |
| 2008 | 12 | 3 | 9 |
| 2009 | 11 | 8 | 3 |
| 2010 | 10 | 6 | 4 |
| 2011 | 16 | 2 | 14 |
| 2012 | 10 | 3 | 7 |
| 2013 | 6 | 6 | 0 |
| 2014 | 5 | 7 | -2 |
| 2015 | 9 | 4 | 5 |
| 2016 | 18 | 8 | 10 |
| 2017 | 11 | 4 | 7 |
| 2018 | 10 | 4 | 6 |
| 2019 | 9 | 4 | 5 |
| 2020 | 11 | 3 | 8 |
| 2021 | 20 | 3 | 17 |
| 2022 | 7 | 1 | 6 |
| 2023 | |||
| Totaal | 360 | 168 | 192 |
Opm: periode 1991 t/m juni 2002 betreft Rijswijk (ZH) en vanaf juli 2002 t/m heden Nootdorp
