| Year | Count |
|---|---|
| 1993 | 10 |
| 1994 | 11 |
| 1995 | 37 |
| 1996 | 31 |
| 1997 | 36 |
| 1998 | 70 |
| 1999 | 62 |
| 2000 | 84 |
| 2001 | 64 |
| 2002 | 93 |
| 2003 | 143 |
| 2004 | 191 |
| 2005 | 218 |
| 2006 | 219 |
| 2007 | 185 |
| 2008 | 250 |
| 2009 | 192 |
| 2010 | 250 |
| 2011 | 245 |
| 2012 | 267 |
| 2013 | 275 |
| 2014 | 268 |
| 2015 | 308 |
| 2016 | 282 |
| 2017 | 246 |
| 2018 | 272 |
| 2019 | 175 |
| 2020 | 166 |
| 2021 | 78 |
| 2022 | 47 |
| 2023 | 36 |
| 2024 | 27 |