| Year | Count |
|---|---|
| 1910 | 6 |
| 1913 | 5 |
| 1915 | 5 |
| 1916 | 6 |
| 1919 | 7 |
| 1920 | 8 |
| 1921 | 6 |
| 1922 | 7 |
| 1923 | 8 |
| 1924 | 6 |
| 1925 | 10 |
| 1926 | 7 |
| 1927 | 17 |
| 1928 | 9 |
| 1929 | 8 |
| 1930 | 11 |
| 1939 | 10 |
| 1940 | 9 |
| 1941 | 6 |
| 1942 | 5 |
| 1943 | 8 |
| 1944 | 9 |
| 1945 | 19 |
| 1946 | 16 |
| 1947 | 51 |
| 1948 | 11 |
| 1949 | 12 |
| 1955 | 33 |
| 1956 | 10 |
| 1957 | 20 |
| 1959 | 16 |
| 1962 | 16 |
| 1963 | 14 |
| 1964 | 12 |
| 1965 | 14 |
| 1966 | 12 |
| 1967 | 24 |
| 1968 | 14 |
| 1970 | 7 |
| 1971 | 6 |
| 1973 | 5 |
| 1974 | 7 |
| 1975 | 6 |
| 1976 | 8 |
| 1977 | 6 |
| 1978 | 6 |
| 1980 | 6 |
| 1981 | 6 |
| 1982 | 6 |
| 1983 | 9 |
| 1984 | 6 |
| 1985 | 8 |
| 1988 | 7 |
| 1990 | 6 |
| 1997 | 9 |
| 2000 | 5 |
| 2005 | 5 |
| 2006 | 5 |