| Year | Count |
|---|---|
| 1934 | 5 |
| 1938 | 17 |
| 1939 | 5 |
| 1940 | 16 |
| 1941 | 5 |
| 1942 | 15 |
| 1943 | 30 |
| 1944 | 32 |
| 1945 | 12 |
| 1946 | 44 |
| 1947 | 48 |
| 1948 | 55 |
| 1949 | 77 |
| 1950 | 29 |
| 1951 | 15 |
| 1952 | 36 |
| 1953 | 16 |
| 1954 | 30 |
| 1955 | 19 |
| 1956 | 19 |
| 1957 | 22 |
| 1958 | 16 |
| 1959 | 22 |
| 1960 | 5 |
| 1961 | 15 |
| 1962 | 6 |
| 1964 | 10 |
| 1966 | 24 |
| 1967 | 21 |
| 1968 | 12 |
| 1969 | 14 |
| 1972 | 15 |
| 1977 | 6 |
| 1984 | 6 |