| Year | Count |
|---|---|
| 1976 | 10 |
| 1982 | 6 |
| 1986 | 6 |
| 1987 | 5 |
| 1989 | 9 |
| 1991 | 8 |
| 1992 | 8 |
| 1993 | 8 |
| 1994 | 7 |
| 1995 | 8 |
| 1996 | 5 |
| 1997 | 8 |
| 1998 | 7 |
| 1999 | 15 |
| 2000 | 26 |
| 2001 | 20 |
| 2002 | 17 |
| 2003 | 23 |
| 2004 | 23 |
| 2005 | 22 |
| 2006 | 30 |
| 2007 | 27 |
| 2008 | 26 |
| 2009 | 28 |
| 2010 | 31 |
| 2011 | 38 |
| 2012 | 36 |
| 2013 | 25 |
| 2014 | 38 |
| 2015 | 42 |
| 2018 | 32 |
| 2020 | 68 |
| 2023 | 76 |
| 2024 | 94 |