| Year | Count |
|---|---|
| 1967 | 6 |
| 1973 | 5 |
| 1975 | 11 |
| 1976 | 7 |
| 1977 | 13 |
| 1978 | 5 |
| 1979 | 5 |
| 1982 | 6 |
| 1989 | 5 |
| 1990 | 5 |
| 1995 | 6 |
| 1995 | 10 |
| 1996 | 13 |
| 1997 | 9 |
| 1997 | 6 |
| 1998 | 41 |
| 1999 | 37 |
| 2000 | 39 |
| 2001 | 53 |
| 2002 | 6 |
| 2002 | 81 |
| 2003 | 78 |
| 2004 | 10 |
| 2004 | 122 |
| 2005 | 5 |
| 2005 | 116 |
| 2006 | 16 |
| 2006 | 104 |
| 2007 | 111 |
| 2008 | 6 |
| 2008 | 86 |
| 2009 | 120 |
| 2010 | 5 |
| 2010 | 124 |
| 2011 | 117 |
| 2012 | 101 |
| 2013 | 113 |
| 2014 | 175 |
| 2015 | 21 |
| 2015 | 145 |
| 2016 | 8 |
| 2016 | 115 |
| 2017 | 8 |
| 2017 | 124 |
| 2018 | 136 |
| 2019 | 17 |
| 2019 | 116 |
| 2020 | 10 |
| 2020 | 139 |
| 2021 | 6 |
| 2021 | 162 |
| 2022 | 26 |
| 2022 | 111 |
| 2023 | 11 |
| 2023 | 129 |
| 2024 | 27 |
| 2024 | 107 |