| Year | Count |
|---|---|
| 1990 | 7 |
| 1991 | 12 |
| 1992 | 118 |
| 1993 | 61 |
| 1994 | 192 |
| 1995 | 167 |
| 1996 | 263 |
| 1997 | 278 |
| 1998 | 507 |
| 1999 | 1,072 |
| 2000 | 1,578 |
| 2001 | 2,127 |
| 2002 | 2,840 |
| 2003 | 27 |
| 2003 | 4,296 |
| 2004 | 54 |
| 2004 | 5,072 |
| 2005 | 40 |
| 2005 | 5,565 |
| 2006 | 20 |
| 2006 | 5,891 |
| 2007 | 17 |
| 2007 | 5,863 |
| 2008 | 49 |
| 2008 | 5,595 |
| 2009 | 10 |
| 2009 | 4,972 |
| 2010 | 12 |
| 2010 | 3,948 |
| 2011 | 3,636 |
| 2012 | 3,462 |
| 2013 | 2,796 |
| 2014 | 2,461 |
| 2015 | 2,876 |
| 2016 | 2,740 |
| 2017 | 2,223 |
| 2018 | 2,057 |
| 2019 | 1,877 |
| 2020 | 1,600 |
| 2021 | 1,822 |
| 2022 | 1,846 |
| 2023 | 2,042 |
| 2024 | 7 |
| 2024 | 1,866 |