| Year | Count |
|---|---|
| 1941 | 7 |
| 1942 | 26 |
| 1943 | 20 |
| 1944 | 23 |
| 1945 | 17 |
| 1946 | 38 |
| 1947 | 50 |
| 1948 | 38 |
| 1949 | 18 |
| 1954 | 5 |
| 1955 | 10 |
| 1956 | 5 |
| 1957 | 23 |
| 1958 | 37 |
| 1959 | 46 |
| 1960 | 42 |
| 1961 | 38 |
| 1962 | 48 |
| 1963 | 25 |
| 1964 | 23 |
| 1965 | 18 |
| 1966 | 37 |
| 1967 | 25 |
| 1968 | 8 |
| 1969 | 15 |
| 1970 | 5 |
| 1971 | 5 |
| 1973 | 6 |
| 1974 | 14 |
| 1976 | 6 |
| 1977 | 6 |
| 1983 | 5 |
| 1984 | 6 |
| 1985 | 10 |
| 1986 | 18 |