| Year | Count |
|---|---|
| 1982 | 5 |
| 1985 | 5 |
| 1987 | 11 |
| 1989 | 7 |
| 1990 | 5 |
| 1991 | 20 |
| 1992 | 6 |
| 1993 | 32 |
| 1994 | 23 |
| 1995 | 643 |
| 1996 | 2,207 |
| 1997 | 1,027 |
| 1998 | 1,407 |
| 1999 | 1,913 |
| 2000 | 1,263 |
| 2001 | 877 |
| 2002 | 586 |
| 2003 | 1,164 |
| 2004 | 1,118 |
| 2005 | 946 |
| 2006 | 826 |
| 2007 | 683 |
| 2008 | 578 |
| 2009 | 336 |
| 2010 | 276 |
| 2011 | 301 |
| 2012 | 195 |
| 2013 | 161 |
| 2014 | 113 |
| 2015 | 113 |
| 2016 | 141 |
| 2017 | 45 |
| 2018 | 90 |
| 2019 | 51 |
| 2020 | 60 |
| 2021 | 71 |
| 2022 | 45 |
| 2023 | 50 |
| 2024 | 30 |