| Year | Count |
|---|---|
| 1991 | 7 |
| 1992 | 27 |
| 1993 | 76 |
| 1994 | 130 |
| 1995 | 209 |
| 1996 | 357 |
| 1997 | 604 |
| 1998 | 653 |
| 1999 | 1,167 |
| 2000 | 1,178 |
| 2001 | 1,316 |
| 2002 | 1,403 |
| 2003 | 1,735 |
| 2004 | 1,938 |
| 2005 | 2,155 |
| 2006 | 1,913 |
| 2007 | 1,882 |
| 2008 | 1,769 |
| 2009 | 1,516 |
| 2010 | 1,733 |
| 2011 | 1,777 |
| 2012 | 1,689 |
| 2013 | 1,496 |
| 2014 | 1,307 |
| 2015 | 1,295 |
| 2016 | 1,259 |
| 2017 | 1,204 |
| 2018 | 1,105 |
| 2019 | 967 |
| 2020 | 833 |
| 2021 | 978 |
| 2022 | 929 |
| 2023 | 807 |
| 2024 | 690 |