| Year | Count |
|---|---|
| 1985 | 5 |
| 1986 | 15 |
| 1987 | 10 |
| 1988 | 40 |
| 1989 | 44 |
| 1990 | 51 |
| 1991 | 268 |
| 1992 | 1,743 |
| 1993 | 1,457 |
| 1994 | 1,289 |
| 1995 | 1,096 |
| 1996 | 822 |
| 1997 | 679 |
| 1998 | 623 |
| 1999 | 603 |
| 2000 | 518 |
| 2001 | 427 |
| 2002 | 326 |
| 2003 | 317 |
| 2004 | 286 |
| 2005 | 240 |
| 2006 | 278 |
| 2007 | 188 |
| 2008 | 178 |
| 2009 | 125 |
| 2010 | 139 |
| 2011 | 145 |
| 2012 | 136 |
| 2013 | 105 |
| 2014 | 110 |
| 2015 | 105 |
| 2016 | 141 |
| 2017 | 151 |
| 2018 | 99 |
| 2019 | 83 |
| 2020 | 128 |
| 2021 | 95 |
| 2022 | 88 |
| 2023 | 76 |
| 2024 | 58 |