| Year | Count |
|---|---|
| 1916 | 5 |
| 1944 | 5 |
| 1946 | 10 |
| 1947 | 12 |
| 1952 | 5 |
| 1953 | 8 |
| 1954 | 12 |
| 1955 | 79 |
| 1956 | 55 |
| 1957 | 69 |
| 1958 | 104 |
| 1959 | 99 |
| 1960 | 97 |
| 1961 | 153 |
| 1962 | 137 |
| 1963 | 107 |
| 1964 | 157 |
| 1965 | 143 |
| 1966 | 154 |
| 1967 | 165 |
| 1968 | 215 |
| 1969 | 197 |
| 1970 | 238 |
| 1971 | 240 |
| 1972 | 142 |
| 1973 | 113 |
| 1974 | 88 |
| 1975 | 83 |
| 1976 | 112 |
| 1977 | 64 |
| 1978 | 51 |
| 1979 | 27 |
| 1980 | 27 |
| 1981 | 18 |
| 1982 | 7 |
| 1984 | 5 |
| 1986 | 12 |