| Year | Count |
|---|---|
| 1972 | 6 |
| 1976 | 10 |
| 1978 | 5 |
| 1979 | 14 |
| 1979 | 5 |
| 1983 | 14 |
| 1984 | 7 |
| 1985 | 24 |
| 1987 | 29 |
| 1988 | 22 |
| 1989 | 46 |
| 1990 | 57 |
| 1991 | 21 |
| 1992 | 134 |
| 1993 | 118 |
| 1994 | 138 |
| 1995 | 99 |
| 1995 | 5 |
| 1996 | 115 |
| 1997 | 118 |
| 1998 | 120 |
| 1999 | 123 |
| 1999 | 14 |
| 2000 | 135 |
| 2001 | 116 |
| 2002 | 96 |
| 2003 | 109 |
| 2004 | 161 |
| 2005 | 93 |
| 2006 | 152 |
| 2007 | 66 |
| 2008 | 152 |
| 2009 | 96 |
| 2010 | 75 |
| 2011 | 72 |
| 2012 | 41 |
| 2013 | 44 |
| 2013 | 6 |
| 2014 | 86 |
| 2015 | 107 |
| 2015 | 10 |
| 2016 | 86 |
| 2017 | 81 |
| 2017 | 17 |
| 2018 | 49 |
| 2018 | 42 |
| 2019 | 65 |
| 2019 | 27 |
| 2020 | 102 |
| 2020 | 5 |
| 2021 | 35 |
| 2021 | 52 |
| 2022 | 96 |
| 2022 | 33 |
| 2023 | 44 |
| 2023 | 21 |
| 2024 | 63 |
| 2024 | 26 |