| Year | Count |
|---|---|
| 1992 | 5 |
| 1995 | 15 |
| 1997 | 5 |
| 1998 | 31 |
| 1999 | 42 |
| 2000 | 96 |
| 2001 | 175 |
| 2002 | 158 |
| 2003 | 195 |
| 2004 | 282 |
| 2005 | 276 |
| 2006 | 374 |
| 2007 | 430 |
| 2008 | 393 |
| 2009 | 558 |
| 2010 | 483 |
| 2011 | 524 |
| 2012 | 565 |
| 2013 | 484 |
| 2014 | 473 |
| 2015 | 383 |
| 2016 | 399 |
| 2017 | 440 |
| 2018 | 303 |
| 2019 | 439 |
| 2020 | 319 |
| 2021 | 305 |
| 2022 | 303 |
| 2023 | 214 |
| 2024 | 185 |