| Year | Count |
|---|---|
| 1988 | 14 |
| 1989 | 12 |
| 1990 | 8 |
| 1991 | 17 |
| 1992 | 63 |
| 1993 | 57 |
| 1994 | 87 |
| 1995 | 42 |
| 1996 | 84 |
| 1997 | 99 |
| 1998 | 90 |
| 1999 | 100 |
| 2000 | 59 |
| 2001 | 96 |
| 2002 | 124 |
| 2003 | 97 |
| 2004 | 176 |
| 2005 | 152 |
| 2006 | 136 |
| 2007 | 174 |
| 2008 | 182 |
| 2009 | 114 |
| 2010 | 102 |
| 2011 | 85 |
| 2012 | 75 |
| 2013 | 73 |
| 2014 | 55 |
| 2015 | 114 |
| 2016 | 104 |
| 2017 | 124 |
| 2018 | 61 |
| 2019 | 73 |
| 2020 | 94 |
| 2021 | 74 |
| 2022 | 106 |
| 2023 | 115 |
| 2024 | 131 |