| Year | Count |
|---|---|
| 1912 | 7 |
| 1913 | 7 |
| 1914 | 8 |
| 1915 | 6 |
| 1916 | 9 |
| 1917 | 5 |
| 1918 | 14 |
| 1919 | 10 |
| 1920 | 7 |
| 1921 | 10 |
| 1922 | 12 |
| 1923 | 5 |
| 1924 | 15 |
| 1925 | 11 |
| 1926 | 7 |
| 1927 | 12 |
| 1928 | 15 |
| 1930 | 9 |
| 1931 | 6 |
| 1932 | 6 |
| 1942 | 7 |
| 1945 | 7 |
| 1947 | 7 |
| 1949 | 8 |
| 1950 | 8 |
| 1952 | 9 |
| 1953 | 7 |
| 1954 | 7 |
| 1955 | 9 |
| 1956 | 7 |
| 1957 | 5 |
| 1958 | 9 |
| 1959 | 6 |
| 1960 | 5 |
| 1961 | 8 |
| 1962 | 5 |
| 1963 | 6 |
| 1964 | 5 |
| 1966 | 8 |
| 1967 | 10 |
| 1968 | 5 |
| 1969 | 8 |
| 1970 | 6 |
| 1971 | 7 |
| 1972 | 5 |
| 1974 | 5 |
| 1975 | 5 |
| 1977 | 7 |
| 1978 | 6 |
| 1979 | 6 |
| 1980 | 5 |
| 1981 | 12 |
| 1982 | 6 |
| 1983 | 9 |
| 1984 | 12 |
| 1985 | 8 |
| 1986 | 9 |
| 1987 | 11 |
| 1988 | 19 |
| 1989 | 9 |
| 1990 | 14 |
| 1991 | 19 |
| 1992 | 17 |
| 1993 | 13 |
| 1994 | 11 |
| 1995 | 11 |
| 1996 | 16 |
| 1997 | 14 |
| 1998 | 10 |
| 1999 | 17 |
| 2000 | 23 |
| 2001 | 21 |
| 2002 | 24 |
| 2003 | 23 |
| 2004 | 35 |
| 2005 | 30 |
| 2006 | 35 |
| 2007 | 50 |
| 2008 | 42 |
| 2009 | 49 |
| 2010 | 62 |
| 2011 | 58 |
| 2012 | 77 |
| 2013 | 69 |
| 2014 | 77 |
| 2015 | 109 |
| 2016 | 196 |
| 2017 | 278 |
| 2018 | 442 |
| 2019 | 390 |
| 2020 | 160 |
| 2021 | 163 |
| 2022 | 180 |
| 2023 | 153 |
| 2024 | 123 |