| Year | Count |
|---|---|
| 1922 | 5 |
| 1945 | 5 |
| 1948 | 9 |
| 1949 | 5 |
| 1950 | 6 |
| 1952 | 21 |
| 1953 | 35 |
| 1954 | 58 |
| 1955 | 95 |
| 1956 | 114 |
| 1957 | 221 |
| 1958 | 283 |
| 1959 | 329 |
| 1960 | 343 |
| 1961 | 415 |
| 1962 | 518 |
| 1963 | 634 |
| 1964 | 652 |
| 1965 | 449 |
| 1966 | 331 |
| 1967 | 232 |
| 1968 | 336 |
| 1969 | 401 |
| 1970 | 324 |
| 1971 | 260 |
| 1972 | 157 |
| 1973 | 74 |
| 1974 | 95 |
| 1975 | 68 |
| 1976 | 15 |
| 1977 | 26 |
| 1978 | 31 |
| 1979 | 7 |
| 1980 | 17 |
| 1981 | 5 |
| 1982 | 18 |
| 1984 | 8 |
| 1986 | 5 |
| 1988 | 5 |
| 1990 | 5 |