| Year | Count |
|---|---|
| 1996 | 6 |
| 1997 | 8 |
| 1999 | 13 |
| 2000 | 24 |
| 2001 | 67 |
| 2002 | 103 |
| 2003 | 150 |
| 2004 | 290 |
| 2005 | 346 |
| 2006 | 386 |
| 2007 | 402 |
| 2008 | 479 |
| 2009 | 494 |
| 2010 | 473 |
| 2011 | 556 |
| 2012 | 620 |
| 2013 | 454 |
| 2014 | 331 |
| 2015 | 435 |
| 2016 | 417 |
| 2017 | 395 |
| 2018 | 263 |
| 2019 | 284 |
| 2020 | 271 |
| 2021 | 278 |
| 2022 | 237 |
| 2023 | 197 |
| 2024 | 135 |