| Year | Count |
|---|---|
| 1919 | 6 |
| 1921 | 5 |
| 1929 | 5 |
| 1936 | 6 |
| 1937 | 5 |
| 1942 | 16 |
| 1943 | 25 |
| 1945 | 30 |
| 1947 | 40 |
| 1948 | 20 |
| 1949 | 39 |
| 1950 | 25 |
| 1951 | 27 |
| 1952 | 36 |
| 1953 | 16 |
| 1954 | 11 |
| 1955 | 13 |
| 1956 | 20 |
| 1957 | 5 |
| 1958 | 51 |
| 1959 | 30 |
| 1960 | 28 |
| 1961 | 38 |
| 1962 | 6 |
| 1965 | 29 |
| 1966 | 37 |
| 1967 | 18 |
| 1969 | 6 |
| 1970 | 48 |
| 1971 | 30 |
| 1972 | 15 |
| 1973 | 10 |
| 1974 | 19 |
| 1977 | 5 |
| 1980 | 5 |
| 1983 | 14 |
| 1984 | 22 |
| 1985 | 16 |
| 1987 | 14 |
| 1989 | 10 |
| 1994 | 15 |