| Year | Count |
|---|---|
| 1992 | 5 |
| 1993 | 5 |
| 1995 | 8 |
| 1996 | 32 |
| 1997 | 54 |
| 1998 | 178 |
| 1999 | 290 |
| 2000 | 465 |
| 2001 | 546 |
| 2002 | 620 |
| 2003 | 770 |
| 2004 | 741 |
| 2005 | 726 |
| 2006 | 865 |
| 2007 | 701 |
| 2008 | 635 |
| 2009 | 543 |
| 2010 | 496 |
| 2011 | 339 |
| 2012 | 338 |
| 2013 | 222 |
| 2014 | 243 |
| 2015 | 209 |
| 2016 | 202 |
| 2017 | 148 |
| 2018 | 91 |
| 2019 | 59 |
| 2020 | 83 |
| 2021 | 91 |
| 2022 | 90 |
| 2023 | 113 |
| 2024 | 71 |