| Year | Count |
|---|---|
| 1989 | 5 |
| 1995 | 5 |
| 1996 | 20 |
| 1997 | 26 |
| 1998 | 98 |
| 1999 | 33 |
| 2000 | 113 |
| 2001 | 132 |
| 2002 | 123 |
| 2003 | 179 |
| 2004 | 252 |
| 2005 | 333 |
| 2006 | 320 |
| 2007 | 376 |
| 2008 | 389 |
| 2009 | 336 |
| 2010 | 326 |
| 2011 | 351 |
| 2012 | 359 |
| 2013 | 284 |
| 2014 | 308 |
| 2015 | 335 |
| 2016 | 307 |
| 2017 | 324 |
| 2018 | 233 |
| 2019 | 252 |
| 2020 | 218 |
| 2021 | 273 |
| 2022 | 410 |
| 2023 | 421 |
| 2024 | 429 |