| Year | Count |
|---|---|
| 1928 | 17 |
| 1934 | 6 |
| 1941 | 5 |
| 1942 | 5 |
| 1943 | 7 |
| 1944 | 6 |
| 1945 | 10 |
| 1946 | 24 |
| 1947 | 29 |
| 1948 | 15 |
| 1949 | 8 |
| 1950 | 21 |
| 1951 | 33 |
| 1952 | 35 |
| 1953 | 20 |
| 1954 | 29 |
| 1955 | 51 |
| 1956 | 6 |
| 1957 | 44 |
| 1958 | 18 |
| 1959 | 65 |
| 1960 | 15 |
| 1961 | 22 |
| 1962 | 22 |
| 1963 | 32 |
| 1964 | 31 |
| 1965 | 33 |
| 1966 | 38 |
| 1967 | 15 |
| 1968 | 24 |
| 1969 | 13 |
| 1970 | 11 |
| 1971 | 14 |
| 1972 | 6 |
| 1973 | 10 |
| 1974 | 5 |
| 1977 | 5 |
| 1981 | 6 |
| 1982 | 5 |
| 1983 | 5 |
| 1984 | 7 |
| 1985 | 7 |
| 1986 | 5 |
| 1987 | 8 |
| 1993 | 5 |
| 1994 | 7 |