| Year | Count |
|---|---|
| 1992 | 5 |
| 1994 | 5 |
| 1995 | 6 |
| 1996 | 16 |
| 1997 | 35 |
| 1998 | 24 |
| 1999 | 45 |
| 2000 | 90 |
| 2001 | 77 |
| 2002 | 65 |
| 2003 | 97 |
| 2004 | 144 |
| 2005 | 118 |
| 2006 | 161 |
| 2007 | 118 |
| 2008 | 138 |
| 2009 | 85 |
| 2010 | 53 |
| 2011 | 57 |
| 2012 | 50 |
| 2013 | 42 |
| 2014 | 30 |
| 2015 | 50 |
| 2016 | 38 |
| 2017 | 28 |
| 2018 | 45 |
| 2019 | 41 |
| 2020 | 48 |
| 2021 | 39 |
| 2022 | 34 |
| 2023 | 23 |
| 2024 | 21 |