| Year | Count |
|---|---|
| 1984 | 10 |
| 1987 | 19 |
| 1988 | 18 |
| 1989 | 5 |
| 1990 | 21 |
| 1991 | 24 |
| 1992 | 33 |
| 1993 | 26 |
| 1994 | 39 |
| 1995 | 25 |
| 1996 | 57 |
| 1997 | 60 |
| 1998 | 79 |
| 1999 | 47 |
| 2000 | 51 |
| 2001 | 85 |
| 2002 | 61 |
| 2003 | 60 |
| 2004 | 54 |
| 2005 | 40 |
| 2006 | 27 |
| 2007 | 24 |
| 2008 | 33 |
| 2009 | 7 |
| 2010 | 16 |
| 2011 | 18 |
| 2012 | 9 |
| 2014 | 17 |
| 2015 | 22 |
| 2016 | 12 |
| 2020 | 7 |
| 2024 | 5 |