| Year | Count |
|---|---|
| 1989 | 16 |
| 1990 | 27 |
| 1991 | 17 |
| 1992 | 22 |
| 1993 | 36 |
| 1994 | 72 |
| 1995 | 81 |
| 1996 | 86 |
| 1997 | 112 |
| 1998 | 201 |
| 1999 | 10 |
| 1999 | 224 |
| 2000 | 289 |
| 2001 | 12 |
| 2001 | 395 |
| 2002 | 516 |
| 2003 | 36 |
| 2003 | 703 |
| 2004 | 16 |
| 2004 | 888 |
| 2005 | 22 |
| 2005 | 932 |
| 2006 | 5 |
| 2006 | 870 |
| 2007 | 37 |
| 2007 | 894 |
| 2008 | 12 |
| 2008 | 1,113 |
| 2009 | 10 |
| 2009 | 967 |
| 2010 | 973 |
| 2011 | 792 |
| 2012 | 14 |
| 2012 | 962 |
| 2013 | 6 |
| 2013 | 609 |
| 2014 | 640 |
| 2015 | 5 |
| 2015 | 752 |
| 2016 | 5 |
| 2016 | 742 |
| 2017 | 705 |
| 2018 | 5 |
| 2018 | 711 |
| 2019 | 691 |
| 2020 | 588 |
| 2021 | 760 |
| 2022 | 5 |
| 2022 | 741 |
| 2023 | 6 |
| 2023 | 589 |
| 2024 | 5 |
| 2024 | 613 |