| Year | Count |
|---|---|
| 1985 | 7 |
| 1986 | 9 |
| 1987 | 27 |
| 1988 | 37 |
| 1989 | 16 |
| 1990 | 47 |
| 1991 | 137 |
| 1992 | 208 |
| 1993 | 310 |
| 1994 | 352 |
| 1995 | 386 |
| 1996 | 549 |
| 1997 | 522 |
| 1998 | 550 |
| 1999 | 555 |
| 2000 | 746 |
| 2001 | 764 |
| 2002 | 800 |
| 2003 | 911 |
| 2004 | 1,008 |
| 2004 | 10 |
| 2005 | 1,012 |
| 2006 | 819 |
| 2007 | 892 |
| 2008 | 795 |
| 2009 | 623 |
| 2010 | 608 |
| 2011 | 532 |
| 2012 | 480 |
| 2013 | 340 |
| 2014 | 335 |
| 2015 | 335 |
| 2016 | 287 |
| 2017 | 308 |
| 2018 | 244 |
| 2019 | 244 |
| 2020 | 145 |
| 2021 | 181 |
| 2022 | 167 |
| 2023 | 149 |
| 2024 | 160 |