| Year | Count |
|---|---|
| 1910 | 5 |
| 1913 | 10 |
| 1914 | 19 |
| 1915 | 10 |
| 1916 | 16 |
| 1917 | 21 |
| 1918 | 23 |
| 1919 | 22 |
| 1920 | 18 |
| 1922 | 6 |
| 1924 | 5 |
| 1964 | 5 |
| 1968 | 5 |
| 1971 | 5 |
| 1972 | 6 |
| 1973 | 7 |
| 1975 | 7 |
| 1977 | 14 |
| 1978 | 18 |
| 1979 | 14 |
| 1980 | 10 |
| 1981 | 12 |
| 1982 | 14 |
| 1983 | 16 |
| 1984 | 20 |
| 1985 | 7 |
| 1986 | 12 |
| 1987 | 11 |
| 1988 | 19 |
| 1989 | 20 |
| 1990 | 7 |
| 1991 | 24 |
| 1992 | 42 |
| 1993 | 9 |
| 1994 | 33 |
| 1995 | 5 |
| 1996 | 5 |
| 1997 | 26 |
| 1998 | 8 |
| 1999 | 19 |
| 2000 | 10 |
| 2001 | 37 |
| 2002 | 5 |
| 2003 | 43 |
| 2004 | 41 |
| 2005 | 11 |
| 2006 | 32 |
| 2007 | 9 |
| 2009 | 11 |
| 2011 | 20 |
| 2012 | 18 |
| 2013 | 14 |
| 2014 | 18 |
| 2015 | 44 |
| 2016 | 38 |
| 2017 | 30 |
| 2018 | 40 |
| 2019 | 26 |
| 2020 | 53 |
| 2021 | 22 |
| 2022 | 10 |
| 2023 | 40 |
| 2024 | 32 |