| Year | Count |
|---|---|
| 1992 | 7 |
| 1994 | 8 |
| 1996 | 25 |
| 1997 | 17 |
| 1998 | 71 |
| 1999 | 33 |
| 1999 | 5 |
| 2000 | 60 |
| 2001 | 84 |
| 2002 | 55 |
| 2003 | 86 |
| 2004 | 221 |
| 2005 | 168 |
| 2006 | 227 |
| 2007 | 261 |
| 2007 | 10 |
| 2008 | 331 |
| 2009 | 274 |
| 2010 | 380 |
| 2011 | 506 |
| 2012 | 474 |
| 2013 | 405 |
| 2014 | 357 |
| 2015 | 507 |
| 2016 | 509 |
| 2017 | 534 |
| 2018 | 366 |
| 2019 | 396 |
| 2020 | 359 |
| 2021 | 383 |
| 2022 | 306 |
| 2023 | 215 |
| 2024 | 168 |