| Year | Count |
|---|---|
| 1917 | 5 |
| 1919 | 6 |
| 1921 | 5 |
| 1923 | 8 |
| 1927 | 5 |
| 1928 | 5 |
| 1929 | 8 |
| 1930 | 9 |
| 1939 | 6 |
| 1940 | 7 |
| 1941 | 6 |
| 1942 | 10 |
| 1943 | 5 |
| 1944 | 11 |
| 1946 | 6 |
| 1947 | 42 |
| 1948 | 9 |
| 1949 | 10 |
| 1955 | 30 |
| 1956 | 14 |
| 1957 | 14 |
| 1959 | 20 |
| 1962 | 12 |
| 1963 | 14 |
| 1964 | 14 |
| 1965 | 14 |
| 1966 | 18 |
| 1968 | 14 |
| 1970 | 9 |
| 1971 | 13 |
| 1972 | 9 |
| 1973 | 13 |
| 1974 | 9 |
| 1975 | 9 |
| 1976 | 14 |
| 1977 | 5 |
| 1978 | 6 |
| 1979 | 6 |
| 1980 | 13 |
| 1981 | 16 |
| 1982 | 11 |
| 1983 | 9 |
| 1984 | 9 |
| 1985 | 8 |
| 1986 | 8 |
| 1987 | 9 |
| 1988 | 5 |
| 1989 | 9 |
| 1990 | 9 |
| 1991 | 9 |
| 1992 | 9 |
| 1994 | 5 |
| 1996 | 5 |
| 1997 | 13 |
| 1999 | 6 |
| 2000 | 7 |
| 2001 | 20 |
| 2007 | 6 |
| 2008 | 16 |
| 2010 | 7 |
| 2019 | 5 |
| 2023 | 5 |