| Year | Count |
|---|---|
| 1990 | 45 |
| 1991 | 53 |
| 1992 | 26 |
| 1993 | 64 |
| 1994 | 45 |
| 1995 | 44 |
| 1996 | 53 |
| 1997 | 47 |
| 1998 | 44 |
| 1999 | 51 |
| 2000 | 61 |
| 2001 | 44 |
| 2002 | 46 |
| 2003 | 47 |
| 2004 | 25 |
| 2005 | 49 |
| 2006 | 32 |
| 2007 | 34 |
| 2008 | 34 |
| 2009 | 10 |
| 2010 | 18 |
| 2011 | 10 |
| 2012 | 7 |
| 2013 | 19 |
| 2014 | 22 |
| 2015 | 33 |
| 2016 | 20 |
| 2017 | 5 |
| 2018 | 18 |
| 2019 | 5 |
| 2023 | 12 |
| 2024 | 5 |