| Year | Count |
|---|---|
| 1945 | 5 |
| 1950 | 29 |
| 1952 | 5 |
| 1953 | 26 |
| 1954 | 31 |
| 1955 | 6 |
| 1956 | 37 |
| 1957 | 88 |
| 1958 | 120 |
| 1959 | 60 |
| 1960 | 97 |
| 1961 | 131 |
| 1962 | 106 |
| 1963 | 50 |
| 1964 | 93 |
| 1965 | 66 |
| 1966 | 39 |
| 1967 | 68 |
| 1968 | 33 |
| 1969 | 44 |
| 1970 | 50 |
| 1971 | 38 |
| 1972 | 5 |
| 1973 | 41 |
| 1974 | 5 |
| 1975 | 20 |
| 1976 | 16 |
| 1978 | 15 |
| 1979 | 5 |
| 1981 | 27 |
| 1982 | 6 |
| 1983 | 17 |
| 1986 | 12 |