| Year | Count |
|---|---|
| 1996 | 5 |
| 1997 | 17 |
| 1998 | 8 |
| 1999 | 17 |
| 2000 | 17 |
| 2001 | 37 |
| 2002 | 38 |
| 2003 | 97 |
| 2004 | 111 |
| 2005 | 159 |
| 2006 | 225 |
| 2007 | 300 |
| 2008 | 258 |
| 2009 | 283 |
| 2010 | 262 |
| 2011 | 350 |
| 2012 | 362 |
| 2013 | 298 |
| 2014 | 264 |
| 2015 | 299 |
| 2016 | 248 |
| 2017 | 246 |
| 2018 | 152 |
| 2019 | 171 |
| 2020 | 158 |
| 2021 | 145 |
| 2022 | 132 |
| 2023 | 105 |
| 2024 | 158 |