| Year | Count |
|---|---|
| 1942 | 5 |
| 1943 | 10 |
| 1944 | 10 |
| 1946 | 45 |
| 1947 | 27 |
| 1948 | 37 |
| 1949 | 32 |
| 1950 | 21 |
| 1951 | 5 |
| 1954 | 5 |
| 1955 | 19 |
| 1956 | 19 |
| 1957 | 29 |
| 1958 | 19 |
| 1959 | 25 |
| 1960 | 17 |
| 1961 | 24 |
| 1962 | 17 |
| 1963 | 11 |
| 1964 | 33 |
| 1965 | 19 |
| 1966 | 14 |
| 1967 | 24 |
| 1968 | 20 |
| 1969 | 14 |
| 1970 | 23 |
| 1971 | 15 |
| 1972 | 5 |
| 1973 | 5 |
| 1976 | 5 |
| 1980 | 6 |
| 1981 | 5 |
| 1985 | 7 |