| Year | Count |
|---|---|
| 1984 | 7 |
| 1987 | 8 |
| 1988 | 5 |
| 1989 | 8 |
| 1990 | 5 |
| 1991 | 8 |
| 1992 | 14 |
| 1994 | 11 |
| 1995 | 8 |
| 1996 | 6 |
| 1997 | 13 |
| 1998 | 10 |
| 1999 | 13 |
| 2000 | 21 |
| 2001 | 25 |
| 2002 | 19 |
| 2003 | 37 |
| 2004 | 39 |
| 2005 | 38 |
| 2006 | 52 |
| 2007 | 32 |
| 2008 | 29 |
| 2009 | 40 |
| 2010 | 39 |
| 2011 | 46 |
| 2012 | 72 |
| 2013 | 41 |
| 2014 | 56 |
| 2015 | 70 |
| 2016 | 102 |
| 2017 | 78 |
| 2018 | 76 |
| 2019 | 93 |
| 2020 | 47 |
| 2021 | 106 |
| 2022 | 104 |
| 2023 | 136 |
| 2024 | 146 |