| Year | Count |
|---|---|
| 1990 | 5 |
| 1991 | 5 |
| 1992 | 25 |
| 1993 | 12 |
| 1994 | 5 |
| 1995 | 24 |
| 1996 | 21 |
| 1997 | 22 |
| 1998 | 31 |
| 1999 | 41 |
| 2000 | 40 |
| 2001 | 22 |
| 2002 | 67 |
| 2003 | 46 |
| 2004 | 118 |
| 2005 | 60 |
| 2006 | 92 |
| 2007 | 81 |
| 2008 | 101 |
| 2009 | 141 |
| 2010 | 101 |
| 2011 | 119 |
| 2012 | 118 |
| 2013 | 115 |
| 2014 | 133 |
| 2015 | 118 |
| 2016 | 138 |
| 2017 | 150 |
| 2018 | 122 |
| 2019 | 144 |
| 2020 | 93 |
| 2021 | 147 |
| 2022 | 103 |
| 2023 | 83 |
| 2024 | 65 |