| Year | Count |
|---|---|
| 1998 | 5 |
| 1999 | 58 |
| 2000 | 206 |
| 2001 | 172 |
| 2002 | 174 |
| 2003 | 337 |
| 2004 | 473 |
| 2005 | 431 |
| 2006 | 472 |
| 2007 | 498 |
| 2008 | 563 |
| 2009 | 554 |
| 2010 | 472 |
| 2011 | 491 |
| 2012 | 607 |
| 2013 | 543 |
| 2014 | 401 |
| 2015 | 510 |
| 2016 | 438 |
| 2017 | 454 |
| 2018 | 353 |
| 2019 | 326 |
| 2020 | 223 |
| 2021 | 200 |
| 2022 | 190 |
| 2023 | 213 |
| 2024 | 158 |