| Year | Count |
|---|---|
| 1915 | 6 |
| 1916 | 5 |
| 1920 | 7 |
| 1921 | 9 |
| 1922 | 8 |
| 1923 | 10 |
| 1924 | 11 |
| 1925 | 11 |
| 1926 | 11 |
| 1927 | 10 |
| 1927 | 16 |
| 1928 | 7 |
| 1929 | 12 |
| 1930 | 8 |
| 1941 | 12 |
| 1942 | 11 |
| 1943 | 7 |
| 1944 | 5 |
| 1945 | 6 |
| 1946 | 11 |
| 1947 | 39 |
| 1948 | 6 |
| 1949 | 10 |
| 1955 | 18 |
| 1956 | 20 |
| 1957 | 14 |
| 1958 | 16 |
| 1962 | 10 |
| 1965 | 10 |
| 1966 | 10 |
| 1971 | 5 |
| 1973 | 8 |
| 1975 | 6 |
| 1979 | 7 |
| 1980 | 6 |
| 1981 | 9 |
| 1982 | 5 |
| 1983 | 5 |
| 1984 | 9 |
| 1985 | 9 |
| 1989 | 8 |
| 1991 | 7 |
| 1995 | 7 |
| 1997 | 6 |
| 2001 | 18 |