| Year | Count |
|---|---|
| 1984 | 10 |
| 1985 | 46 |
| 1986 | 32 |
| 1987 | 33 |
| 1988 | 60 |
| 1989 | 41 |
| 1990 | 68 |
| 1991 | 133 |
| 1992 | 124 |
| 1993 | 129 |
| 1994 | 95 |
| 1995 | 50 |
| 1996 | 67 |
| 1997 | 66 |
| 1998 | 76 |
| 1999 | 53 |
| 2000 | 80 |
| 2001 | 67 |
| 2002 | 71 |
| 2003 | 94 |
| 2004 | 46 |
| 2005 | 46 |
| 2006 | 70 |
| 2007 | 27 |
| 2008 | 66 |
| 2009 | 39 |
| 2010 | 50 |
| 2011 | 32 |
| 2012 | 45 |
| 2013 | 24 |
| 2014 | 27 |
| 2015 | 26 |
| 2016 | 34 |
| 2017 | 12 |
| 2018 | 10 |
| 2019 | 22 |
| 2020 | 28 |
| 2023 | 10 |