| Year | Count |
|---|---|
| 1982 | 10 |
| 1983 | 36 |
| 1984 | 23 |
| 1985 | 72 |
| 1986 | 78 |
| 1987 | 46 |
| 1988 | 33 |
| 1989 | 23 |
| 1990 | 23 |
| 1991 | 27 |
| 1992 | 23 |
| 1993 | 50 |
| 1994 | 41 |
| 1995 | 71 |
| 1996 | 84 |
| 1997 | 82 |
| 1998 | 57 |
| 1999 | 26 |
| 2000 | 47 |
| 2001 | 76 |
| 2002 | 27 |
| 2003 | 45 |
| 2004 | 148 |
| 2005 | 121 |
| 2006 | 77 |
| 2007 | 59 |
| 2008 | 114 |
| 2009 | 10 |
| 2010 | 27 |
| 2011 | 25 |
| 2016 | 8 |
| 2018 | 11 |
| 2022 | 5 |
| 2023 | 7 |