| Year | Count |
|---|---|
| 1985 | 26 |
| 1986 | 42 |
| 1987 | 57 |
| 1988 | 76 |
| 1989 | 118 |
| 1990 | 118 |
| 1991 | 147 |
| 1992 | 147 |
| 1993 | 135 |
| 1994 | 182 |
| 1995 | 214 |
| 1996 | 261 |
| 1997 | 241 |
| 1998 | 295 |
| 1999 | 307 |
| 2000 | 242 |
| 2001 | 232 |
| 2002 | 218 |
| 2003 | 293 |
| 2004 | 355 |
| 2005 | 375 |
| 2006 | 323 |
| 2007 | 204 |
| 2008 | 212 |
| 2009 | 134 |
| 2010 | 166 |
| 2011 | 150 |
| 2012 | 94 |
| 2013 | 79 |
| 2014 | 46 |
| 2015 | 76 |
| 2016 | 39 |
| 2017 | 19 |
| 2018 | 28 |
| 2019 | 16 |
| 2020 | 31 |
| 2021 | 21 |
| 2022 | 29 |
| 2023 | 11 |
| 2024 | 8 |