| Year | Count |
|---|---|
| 1985 | 7 |
| 1986 | 15 |
| 1987 | 9 |
| 1989 | 7 |
| 1990 | 9 |
| 1991 | 14 |
| 1992 | 19 |
| 1993 | 19 |
| 1994 | 23 |
| 1995 | 21 |
| 1996 | 25 |
| 1997 | 29 |
| 1998 | 37 |
| 1999 | 51 |
| 2000 | 51 |
| 2001 | 46 |
| 2002 | 59 |
| 2003 | 54 |
| 2004 | 51 |
| 2005 | 44 |
| 2006 | 68 |
| 2007 | 59 |
| 2008 | 52 |
| 2009 | 52 |
| 2010 | 46 |
| 2011 | 48 |
| 2012 | 59 |
| 2013 | 43 |
| 2014 | 46 |
| 2015 | 42 |
| 2016 | 108 |
| 2017 | 102 |
| 2018 | 36 |
| 2019 | 70 |
| 2020 | 54 |
| 2021 | 72 |
| 2022 | 38 |
| 2023 | 56 |
| 2024 | 26 |