| Year | Count |
|---|---|
| 1991 | 28 |
| 1993 | 31 |
| 1994 | 87 |
| 1995 | 166 |
| 1996 | 122 |
| 1997 | 166 |
| 1998 | 228 |
| 1999 | 205 |
| 2000 | 236 |
| 2001 | 275 |
| 2002 | 237 |
| 2003 | 356 |
| 2004 | 364 |
| 2005 | 412 |
| 2006 | 479 |
| 2007 | 541 |
| 2008 | 676 |
| 2009 | 886 |
| 2010 | 920 |
| 2011 | 1,068 |
| 2012 | 1,525 |
| 2013 | 1,949 |
| 2014 | 1,872 |
| 2015 | 2,326 |
| 2016 | 2,022 |
| 2017 | 1,921 |
| 2018 | 1,685 |
| 2019 | 1,554 |
| 2020 | 1,281 |
| 2021 | 1,411 |
| 2022 | 1,012 |
| 2023 | 791 |
| 2024 | 670 |