| Year | Count |
|---|---|
| 1985 | 20 |
| 1986 | 104 |
| 1987 | 152 |
| 1988 | 247 |
| 1989 | 293 |
| 1990 | 339 |
| 1991 | 541 |
| 1992 | 555 |
| 1993 | 643 |
| 1994 | 630 |
| 1995 | 715 |
| 1996 | 865 |
| 1997 | 906 |
| 1998 | 1,398 |
| 1999 | 1,106 |
| 2000 | 1,087 |
| 2001 | 1,126 |
| 2002 | 1,096 |
| 2003 | 1,487 |
| 2004 | 1,891 |
| 2004 | 14 |
| 2005 | 1,729 |
| 2006 | 1,550 |
| 2007 | 1,425 |
| 2008 | 1,250 |
| 2009 | 1,000 |
| 2010 | 775 |
| 2011 | 959 |
| 2012 | 804 |
| 2013 | 646 |
| 2014 | 583 |
| 2015 | 619 |
| 2016 | 514 |
| 2017 | 482 |
| 2018 | 365 |
| 2019 | 294 |
| 2020 | 281 |
| 2021 | 263 |
| 2022 | 258 |
| 2023 | 202 |
| 2024 | 134 |