| Year | Count |
|---|---|
| 1994 | 10 |
| 1995 | 5 |
| 1996 | 5 |
| 1997 | 5 |
| 1997 | 13 |
| 1998 | 6 |
| 1998 | 26 |
| 1999 | 13 |
| 1999 | 91 |
| 2000 | 25 |
| 2000 | 156 |
| 2001 | 48 |
| 2001 | 232 |
| 2002 | 52 |
| 2002 | 362 |
| 2003 | 58 |
| 2003 | 417 |
| 2004 | 43 |
| 2004 | 401 |
| 2005 | 37 |
| 2005 | 410 |
| 2006 | 35 |
| 2006 | 400 |
| 2007 | 36 |
| 2007 | 485 |
| 2008 | 18 |
| 2008 | 335 |
| 2009 | 12 |
| 2009 | 288 |
| 2010 | 13 |
| 2010 | 329 |
| 2011 | 9 |
| 2011 | 283 |
| 2012 | 203 |
| 2013 | 220 |
| 2014 | 159 |
| 2015 | 165 |
| 2016 | 266 |
| 2017 | 276 |
| 2018 | 238 |
| 2019 | 198 |
| 2020 | 71 |
| 2021 | 74 |
| 2022 | 72 |
| 2023 | 72 |
| 2024 | 72 |