| Year | Count |
|---|---|
| 1979 | 14 |
| 1980 | 15 |
| 1981 | 16 |
| 1982 | 17 |
| 1983 | 43 |
| 1984 | 23 |
| 1985 | 34 |
| 1986 | 46 |
| 1987 | 54 |
| 1988 | 30 |
| 1989 | 45 |
| 1990 | 41 |
| 1991 | 55 |
| 1992 | 63 |
| 1993 | 34 |
| 1994 | 44 |
| 1995 | 49 |
| 1996 | 43 |
| 1997 | 72 |
| 1998 | 81 |
| 1999 | 60 |
| 2000 | 83 |
| 2001 | 82 |
| 2002 | 76 |
| 2003 | 57 |
| 2004 | 84 |
| 2005 | 96 |
| 2006 | 69 |
| 2007 | 78 |
| 2008 | 64 |
| 2009 | 46 |
| 2010 | 29 |
| 2011 | 71 |
| 2012 | 57 |
| 2013 | 41 |
| 2014 | 66 |
| 2015 | 87 |
| 2016 | 72 |
| 2017 | 109 |
| 2018 | 63 |
| 2019 | 73 |
| 2020 | 49 |
| 2021 | 57 |
| 2022 | 112 |
| 2023 | 103 |
| 2024 | 83 |