| Year | Count |
|---|---|
| 1958 | 6 |
| 1982 | 7 |
| 1983 | 6 |
| 1984 | 10 |
| 1985 | 13 |
| 1986 | 47 |
| 1987 | 33 |
| 1988 | 10 |
| 1988 | 36 |
| 1989 | 37 |
| 1990 | 20 |
| 1990 | 37 |
| 1991 | 12 |
| 1992 | 10 |
| 1992 | 84 |
| 1993 | 20 |
| 1993 | 91 |
| 1994 | 5 |
| 1994 | 70 |
| 1995 | 15 |
| 1995 | 77 |
| 1996 | 6 |
| 1996 | 40 |
| 1997 | 10 |
| 1997 | 48 |
| 1998 | 37 |
| 1998 | 111 |
| 1999 | 34 |
| 2000 | 5 |
| 2000 | 59 |
| 2001 | 18 |
| 2001 | 91 |
| 2002 | 68 |
| 2003 | 104 |
| 2004 | 79 |
| 2005 | 12 |
| 2005 | 86 |
| 2006 | 6 |
| 2006 | 69 |
| 2007 | 5 |
| 2007 | 85 |
| 2008 | 14 |
| 2008 | 73 |
| 2009 | 96 |
| 2010 | 95 |
| 2011 | 5 |
| 2011 | 68 |
| 2012 | 35 |
| 2013 | 49 |
| 2014 | 61 |
| 2015 | 10 |
| 2016 | 29 |
| 2017 | 15 |
| 2018 | 16 |
| 2019 | 23 |
| 2020 | 24 |
| 2021 | 56 |
| 2022 | 49 |
| 2024 | 22 |