| Year | Count |
|---|---|
| 1993 | 10 |
| 1994 | 12 |
| 1995 | 6 |
| 1996 | 41 |
| 1997 | 96 |
| 1998 | 225 |
| 1999 | 337 |
| 2000 | 459 |
| 2001 | 642 |
| 2002 | 849 |
| 2003 | 1,181 |
| 2004 | 1,710 |
| 2005 | 1,763 |
| 2006 | 1,725 |
| 2007 | 1,741 |
| 2008 | 1,653 |
| 2009 | 1,256 |
| 2010 | 1,122 |
| 2011 | 954 |
| 2012 | 846 |
| 2013 | 694 |
| 2014 | 610 |
| 2015 | 605 |
| 2016 | 490 |
| 2017 | 479 |
| 2018 | 414 |
| 2019 | 367 |
| 2020 | 310 |
| 2021 | 299 |
| 2022 | 251 |
| 2023 | 284 |
| 2024 | 213 |