| Year | Count |
|---|---|
| 1994 | 17 |
| 1995 | 11 |
| 1996 | 21 |
| 1997 | 53 |
| 1998 | 73 |
| 1999 | 145 |
| 2000 | 281 |
| 2001 | 452 |
| 2002 | 708 |
| 2003 | 5 |
| 2003 | 1,250 |
| 2004 | 61 |
| 2004 | 1,650 |
| 2005 | 104 |
| 2005 | 1,963 |
| 2006 | 67 |
| 2006 | 2,225 |
| 2007 | 143 |
| 2007 | 2,792 |
| 2008 | 184 |
| 2008 | 2,791 |
| 2009 | 112 |
| 2009 | 3,478 |
| 2010 | 81 |
| 2010 | 3,184 |
| 2011 | 89 |
| 2011 | 3,146 |
| 2012 | 99 |
| 2012 | 3,108 |
| 2013 | 51 |
| 2013 | 3,016 |
| 2014 | 28 |
| 2014 | 2,532 |
| 2015 | 5 |
| 2015 | 2,675 |
| 2016 | 11 |
| 2016 | 2,188 |
| 2017 | 2,076 |
| 2018 | 1,960 |
| 2019 | 1,812 |
| 2020 | 1,478 |
| 2021 | 1,391 |
| 2022 | 1,328 |
| 2023 | 1,140 |
| 2024 | 1,042 |