| Year | Count |
|---|---|
| 1991 | 6 |
| 1992 | 800 |
| 1993 | 17 |
| 1993 | 1,786 |
| 1994 | 29 |
| 1994 | 2,182 |
| 1995 | 15 |
| 1995 | 1,691 |
| 1996 | 16 |
| 1996 | 1,626 |
| 1997 | 1,267 |
| 1998 | 45 |
| 1998 | 1,978 |
| 1999 | 80 |
| 1999 | 2,626 |
| 2000 | 138 |
| 2000 | 4,373 |
| 2001 | 65 |
| 2001 | 3,745 |
| 2002 | 44 |
| 2002 | 3,693 |
| 2003 | 57 |
| 2003 | 3,199 |
| 2004 | 60 |
| 2004 | 2,563 |
| 2005 | 36 |
| 2005 | 2,209 |
| 2006 | 2,040 |
| 2007 | 5 |
| 2007 | 1,489 |
| 2008 | 12 |
| 2008 | 1,295 |
| 2009 | 999 |
| 2010 | 837 |
| 2011 | 814 |
| 2012 | 665 |
| 2013 | 598 |
| 2014 | 603 |
| 2015 | 598 |
| 2016 | 640 |
| 2017 | 542 |
| 2018 | 623 |
| 2019 | 673 |
| 2020 | 551 |
| 2021 | 775 |
| 2022 | 607 |
| 2023 | 729 |
| 2024 | 656 |