| Year | Count |
|---|---|
| 1992 | 9 |
| 1996 | 5 |
| 1997 | 43 |
| 1998 | 64 |
| 1999 | 124 |
| 2000 | 172 |
| 2001 | 178 |
| 2002 | 231 |
| 2003 | 239 |
| 2004 | 351 |
| 2005 | 390 |
| 2006 | 496 |
| 2007 | 455 |
| 2008 | 588 |
| 2009 | 515 |
| 2010 | 434 |
| 2011 | 342 |
| 2012 | 275 |
| 2013 | 303 |
| 2014 | 356 |
| 2015 | 322 |
| 2016 | 356 |
| 2017 | 363 |
| 2018 | 276 |
| 2019 | 252 |
| 2020 | 159 |
| 2021 | 213 |
| 2022 | 94 |
| 2023 | 139 |
| 2024 | 122 |