| Year | Count |
|---|---|
| 1934 | 5 |
| 1942 | 10 |
| 1944 | 19 |
| 1945 | 22 |
| 1946 | 25 |
| 1947 | 41 |
| 1948 | 53 |
| 1949 | 90 |
| 1950 | 62 |
| 1951 | 73 |
| 1952 | 118 |
| 1953 | 58 |
| 1954 | 118 |
| 1955 | 91 |
| 1956 | 72 |
| 1957 | 91 |
| 1958 | 57 |
| 1959 | 110 |
| 1960 | 96 |
| 1961 | 77 |
| 1962 | 117 |
| 1963 | 56 |
| 1964 | 112 |
| 1965 | 95 |
| 1966 | 109 |
| 1967 | 113 |
| 1968 | 109 |
| 1969 | 211 |
| 1970 | 233 |
| 1971 | 189 |
| 1972 | 126 |
| 1973 | 116 |
| 1974 | 95 |
| 1975 | 102 |
| 1976 | 83 |
| 1977 | 91 |
| 1978 | 95 |
| 1979 | 72 |
| 1980 | 56 |
| 1981 | 132 |
| 1982 | 78 |
| 1983 | 38 |
| 1984 | 33 |
| 1985 | 33 |
| 1986 | 6 |
| 1987 | 19 |
| 1988 | 5 |
| 1989 | 20 |
| 1990 | 15 |
| 1991 | 11 |
| 1992 | 26 |
| 1993 | 10 |
| 1995 | 10 |
| 2007 | 5 |