| Year | Count |
|---|---|
| 1921 | 5 |
| 1923 | 10 |
| 1925 | 5 |
| 1927 | 5 |
| 1928 | 27 |
| 1929 | 16 |
| 1931 | 12 |
| 1933 | 34 |
| 1934 | 27 |
| 1935 | 33 |
| 1949 | 6 |
| 1951 | 5 |
| 1952 | 15 |
| 1954 | 18 |
| 1955 | 6 |
| 1956 | 20 |
| 1957 | 12 |
| 1958 | 19 |
| 1959 | 56 |
| 1960 | 24 |
| 1961 | 18 |
| 1962 | 23 |
| 1963 | 44 |
| 1964 | 26 |
| 1965 | 26 |
| 1966 | 27 |
| 1967 | 6 |
| 1968 | 12 |
| 1969 | 11 |
| 1970 | 27 |
| 1971 | 6 |
| 1972 | 11 |
| 1974 | 5 |
| 1975 | 6 |
| 1976 | 7 |
| 1977 | 10 |
| 1978 | 18 |
| 1980 | 6 |
| 1982 | 6 |
| 1986 | 5 |