| Year | Count |
|---|---|
| 1936 | 10 |
| 1939 | 18 |
| 1940 | 20 |
| 1941 | 6 |
| 1943 | 6 |
| 1945 | 11 |
| 1946 | 6 |
| 1947 | 26 |
| 1948 | 20 |
| 1949 | 26 |
| 1950 | 22 |
| 1951 | 54 |
| 1952 | 67 |
| 1953 | 81 |
| 1954 | 40 |
| 1955 | 66 |
| 1956 | 63 |
| 1957 | 86 |
| 1958 | 85 |
| 1959 | 58 |
| 1960 | 81 |
| 1961 | 49 |
| 1962 | 81 |
| 1963 | 50 |
| 1964 | 17 |
| 1965 | 21 |
| 1966 | 20 |
| 1967 | 5 |
| 1969 | 20 |
| 1970 | 7 |
| 1971 | 8 |
| 1972 | 10 |
| 1973 | 10 |
| 1974 | 5 |
| 1975 | 5 |
| 1976 | 5 |
| 1977 | 8 |
| 1979 | 6 |
| 1980 | 6 |
| 1985 | 6 |
| 1990 | 6 |
| 1991 | 6 |
| 1993 | 6 |