| Year | Count |
|---|---|
| 1924 | 5 |
| 1928 | 5 |
| 1930 | 19 |
| 1931 | 25 |
| 1932 | 23 |
| 1933 | 32 |
| 1934 | 11 |
| 1935 | 28 |
| 1936 | 13 |
| 1937 | 7 |
| 1938 | 27 |
| 1939 | 19 |
| 1940 | 23 |
| 1941 | 24 |
| 1942 | 25 |
| 1943 | 37 |
| 1944 | 31 |
| 1945 | 29 |
| 1946 | 12 |
| 1947 | 44 |
| 1948 | 61 |
| 1949 | 80 |
| 1950 | 53 |
| 1951 | 76 |
| 1952 | 30 |
| 1953 | 72 |
| 1954 | 90 |
| 1955 | 81 |
| 1956 | 89 |
| 1957 | 58 |
| 1958 | 97 |
| 1959 | 81 |
| 1960 | 61 |
| 1961 | 33 |
| 1962 | 53 |
| 1963 | 32 |
| 1964 | 37 |
| 1965 | 26 |
| 1966 | 36 |
| 1967 | 31 |
| 1968 | 10 |
| 1969 | 26 |
| 1970 | 10 |
| 1971 | 37 |
| 1972 | 5 |