| Year | Count |
|---|---|
| 1984 | 10 |
| 1986 | 30 |
| 1987 | 14 |
| 1988 | 11 |
| 1992 | 25 |
| 1993 | 12 |
| 1994 | 19 |
| 1995 | 5 |
| 1996 | 36 |
| 1997 | 45 |
| 1998 | 68 |
| 1999 | 12 |
| 2000 | 38 |
| 2001 | 134 |
| 2002 | 23 |
| 2003 | 11 |
| 2004 | 64 |
| 2005 | 102 |
| 2006 | 29 |
| 2007 | 71 |
| 2008 | 78 |
| 2009 | 29 |
| 2010 | 19 |
| 2011 | 11 |
| 2012 | 15 |
| 2013 | 15 |
| 2015 | 11 |
| 2016 | 20 |
| 2017 | 10 |
| 2018 | 5 |
| 2019 | 9 |
| 2020 | 6 |
| 2021 | 5 |
| 2022 | 9 |
| 2023 | 9 |
| 2024 | 8 |