| Year | Count |
|---|---|
| 1984 | 5 |
| 1986 | 5 |
| 1993 | 5 |
| 1994 | 6 |
| 1995 | 9 |
| 1996 | 8 |
| 1997 | 8 |
| 1998 | 12 |
| 1999 | 24 |
| 2000 | 26 |
| 2001 | 19 |
| 2002 | 64 |
| 2003 | 55 |
| 2004 | 89 |
| 2005 | 99 |
| 2006 | 131 |
| 2007 | 143 |
| 2008 | 142 |
| 2009 | 167 |
| 2010 | 178 |
| 2011 | 191 |
| 2012 | 208 |
| 2013 | 215 |
| 2014 | 174 |
| 2015 | 176 |
| 2016 | 525 |
| 2017 | 441 |
| 2018 | 390 |
| 2019 | 268 |
| 2020 | 314 |
| 2021 | 264 |
| 2022 | 252 |
| 2023 | 192 |
| 2024 | 184 |