| Year | Count |
|---|---|
| 1942 | 5 |
| 1944 | 15 |
| 1945 | 9 |
| 1946 | 37 |
| 1947 | 29 |
| 1948 | 44 |
| 1949 | 38 |
| 1950 | 53 |
| 1951 | 79 |
| 1952 | 48 |
| 1953 | 47 |
| 1954 | 82 |
| 1955 | 54 |
| 1956 | 62 |
| 1957 | 39 |
| 1958 | 85 |
| 1959 | 5 |
| 1960 | 35 |
| 1961 | 55 |
| 1962 | 32 |
| 1963 | 30 |
| 1964 | 41 |
| 1965 | 5 |
| 1966 | 13 |
| 1967 | 58 |
| 1968 | 21 |
| 1969 | 64 |
| 1970 | 85 |
| 1971 | 44 |
| 1972 | 174 |
| 1973 | 107 |
| 1974 | 81 |
| 1975 | 64 |
| 1976 | 49 |
| 1977 | 36 |
| 1978 | 77 |
| 1979 | 118 |
| 1980 | 110 |
| 1981 | 94 |
| 1982 | 76 |
| 1983 | 96 |
| 1984 | 68 |
| 1985 | 99 |
| 1986 | 100 |
| 1987 | 25 |
| 1988 | 22 |
| 1989 | 50 |
| 1995 | 8 |