| Year | Count |
|---|---|
| 1996 | 8 |
| 1997 | 20 |
| 1998 | 225 |
| 1999 | 87 |
| 2000 | 75 |
| 2001 | 190 |
| 2002 | 135 |
| 2003 | 173 |
| 2004 | 220 |
| 2005 | 244 |
| 2006 | 224 |
| 2007 | 335 |
| 2008 | 379 |
| 2009 | 309 |
| 2010 | 307 |
| 2011 | 241 |
| 2012 | 167 |
| 2013 | 214 |
| 2014 | 218 |
| 2015 | 279 |
| 2016 | 215 |
| 2017 | 192 |
| 2018 | 172 |
| 2019 | 157 |
| 2020 | 135 |
| 2021 | 96 |
| 2022 | 71 |
| 2023 | 42 |
| 2024 | 47 |