| Year | Count |
|---|---|
| 1988 | 5 |
| 1990 | 7 |
| 1991 | 36 |
| 1992 | 33 |
| 1993 | 10 |
| 1994 | 74 |
| 1995 | 38 |
| 1996 | 33 |
| 1997 | 33 |
| 1998 | 83 |
| 1999 | 104 |
| 2000 | 183 |
| 2001 | 194 |
| 2002 | 124 |
| 2003 | 63 |
| 2004 | 111 |
| 2005 | 99 |
| 2006 | 74 |
| 2007 | 63 |
| 2008 | 81 |
| 2009 | 63 |
| 2010 | 5 |
| 2011 | 24 |
| 2012 | 25 |
| 2013 | 12 |
| 2016 | 12 |
| 2017 | 12 |
| 2019 | 12 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 5 |