| Year | Count |
|---|---|
| 1992 | 35 |
| 1993 | 20 |
| 1994 | 18 |
| 1995 | 23 |
| 1996 | 27 |
| 1997 | 45 |
| 1998 | 41 |
| 1999 | 47 |
| 2000 | 59 |
| 2001 | 107 |
| 2002 | 115 |
| 2003 | 109 |
| 2004 | 155 |
| 2005 | 142 |
| 2006 | 201 |
| 2007 | 179 |
| 2008 | 190 |
| 2009 | 140 |
| 2010 | 137 |
| 2011 | 87 |
| 2012 | 93 |
| 2013 | 83 |
| 2014 | 82 |
| 2015 | 77 |
| 2016 | 70 |
| 2017 | 69 |
| 2018 | 62 |
| 2019 | 43 |
| 2020 | 40 |
| 2021 | 43 |
| 2022 | 45 |
| 2023 | 32 |
| 2024 | 27 |