| Year | Count |
|---|---|
| 1914 | 5 |
| 1962 | 6 |
| 1963 | 9 |
| 1964 | 6 |
| 1966 | 6 |
| 1967 | 8 |
| 1968 | 6 |
| 1969 | 9 |
| 1970 | 9 |
| 1972 | 10 |
| 1973 | 6 |
| 1974 | 8 |
| 1975 | 10 |
| 1977 | 5 |
| 1978 | 12 |
| 1980 | 6 |
| 1981 | 10 |
| 1982 | 5 |
| 1983 | 15 |
| 1984 | 14 |
| 1985 | 23 |
| 1986 | 20 |
| 1987 | 17 |
| 1988 | 17 |
| 1989 | 28 |
| 1990 | 31 |
| 1991 | 46 |
| 1992 | 35 |
| 1993 | 55 |
| 1994 | 57 |
| 1995 | 38 |
| 1996 | 49 |
| 1997 | 31 |
| 1998 | 51 |
| 1999 | 46 |
| 2000 | 38 |
| 2001 | 55 |
| 2002 | 42 |
| 2003 | 43 |
| 2004 | 73 |
| 2005 | 69 |
| 2006 | 40 |
| 2007 | 20 |
| 2008 | 32 |
| 2009 | 41 |
| 2010 | 39 |
| 2011 | 48 |
| 2012 | 45 |
| 2013 | 44 |
| 2014 | 34 |
| 2015 | 42 |
| 2016 | 60 |
| 2017 | 50 |
| 2018 | 37 |
| 2019 | 39 |
| 2020 | 29 |
| 2021 | 66 |
| 2022 | 54 |
| 2023 | 57 |
| 2024 | 48 |