| Year | Count |
|---|---|
| 1986 | 17 |
| 1987 | 47 |
| 1988 | 24 |
| 1989 | 29 |
| 1990 | 58 |
| 1991 | 74 |
| 1992 | 36 |
| 1993 | 47 |
| 1994 | 38 |
| 1995 | 52 |
| 1996 | 24 |
| 1997 | 117 |
| 1998 | 139 |
| 1999 | 105 |
| 2000 | 73 |
| 2001 | 108 |
| 2002 | 66 |
| 2003 | 57 |
| 2004 | 56 |
| 2005 | 56 |
| 2008 | 18 |
| 2009 | 5 |
| 2010 | 6 |
| 2011 | 12 |
| 2012 | 12 |
| 2013 | 14 |
| 2016 | 10 |
| 2017 | 30 |
| 2018 | 10 |
| 2019 | 5 |
| 2020 | 17 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 8 |
| 2024 | 9 |