| Year | Count |
|---|---|
| 1985 | 10 |
| 1986 | 17 |
| 1987 | 11 |
| 1988 | 49 |
| 1989 | 52 |
| 1990 | 80 |
| 1991 | 213 |
| 1992 | 417 |
| 1993 | 534 |
| 1994 | 817 |
| 1995 | 1,009 |
| 1996 | 811 |
| 1997 | 1,031 |
| 1998 | 955 |
| 1999 | 999 |
| 2000 | 941 |
| 2001 | 928 |
| 2002 | 796 |
| 2003 | 707 |
| 2004 | 782 |
| 2005 | 664 |
| 2006 | 612 |
| 2007 | 522 |
| 2008 | 617 |
| 2009 | 404 |
| 2010 | 368 |
| 2011 | 312 |
| 2012 | 231 |
| 2013 | 131 |
| 2014 | 77 |
| 2015 | 85 |
| 2016 | 115 |
| 2017 | 93 |
| 2018 | 109 |
| 2019 | 57 |
| 2020 | 83 |
| 2021 | 56 |
| 2022 | 84 |
| 2023 | 73 |
| 2024 | 28 |