| Year | Count |
|---|---|
| 1985 | 10 |
| 1986 | 20 |
| 1987 | 64 |
| 1988 | 61 |
| 1989 | 156 |
| 1990 | 136 |
| 1991 | 350 |
| 1992 | 395 |
| 1993 | 557 |
| 1994 | 642 |
| 1995 | 568 |
| 1996 | 821 |
| 1997 | 710 |
| 1998 | 852 |
| 1999 | 700 |
| 2000 | 915 |
| 2001 | 816 |
| 2002 | 734 |
| 2003 | 899 |
| 2004 | 798 |
| 2004 | 12 |
| 2005 | 769 |
| 2006 | 637 |
| 2007 | 639 |
| 2008 | 504 |
| 2009 | 569 |
| 2010 | 506 |
| 2011 | 429 |
| 2012 | 304 |
| 2013 | 271 |
| 2014 | 243 |
| 2015 | 228 |
| 2016 | 140 |
| 2017 | 111 |
| 2018 | 97 |
| 2019 | 98 |
| 2020 | 42 |
| 2021 | 8 |
| 2022 | 15 |
| 2023 | 19 |