| Year | Count |
|---|---|
| 1929 | 6 |
| 1935 | 6 |
| 1936 | 8 |
| 1939 | 6 |
| 1941 | 6 |
| 1941 | 6 |
| 1942 | 14 |
| 1943 | 13 |
| 1943 | 9 |
| 1944 | 8 |
| 1944 | 5 |
| 1945 | 8 |
| 1945 | 7 |
| 1946 | 7 |
| 1947 | 9 |
| 1947 | 7 |
| 1948 | 9 |
| 1949 | 5 |
| 1952 | 5 |
| 1953 | 8 |
| 1955 | 5 |
| 1958 | 10 |
| 1959 | 20 |
| 1960 | 38 |
| 1961 | 32 |
| 1962 | 8 |
| 1963 | 12 |
| 1964 | 11 |
| 1965 | 16 |
| 1966 | 16 |
| 1967 | 10 |
| 1968 | 10 |
| 1969 | 11 |
| 1970 | 10 |
| 1973 | 5 |
| 1974 | 6 |
| 1982 | 7 |
| 1984 | 5 |