| Year | Count |
|---|---|
| 1985 | 10 |
| 1987 | 5 |
| 1988 | 5 |
| 1989 | 17 |
| 1990 | 30 |
| 1991 | 81 |
| 1992 | 144 |
| 1993 | 137 |
| 1994 | 144 |
| 1995 | 77 |
| 1996 | 106 |
| 1997 | 132 |
| 1998 | 83 |
| 1999 | 119 |
| 2000 | 118 |
| 2001 | 56 |
| 2002 | 58 |
| 2003 | 57 |
| 2004 | 44 |
| 2005 | 42 |
| 2006 | 69 |
| 2007 | 30 |
| 2008 | 45 |
| 2009 | 5 |
| 2010 | 20 |
| 2011 | 5 |
| 2013 | 5 |
| 2014 | 15 |
| 2015 | 5 |
| 2022 | 5 |