| Year | Count |
|---|---|
| 1923 | 10 |
| 1929 | 5 |
| 1931 | 14 |
| 1932 | 12 |
| 1933 | 50 |
| 1934 | 111 |
| 1935 | 41 |
| 1936 | 91 |
| 1937 | 90 |
| 1938 | 138 |
| 1939 | 65 |
| 1940 | 59 |
| 1941 | 97 |
| 1942 | 90 |
| 1943 | 237 |
| 1944 | 111 |
| 1945 | 48 |
| 1946 | 40 |
| 1947 | 55 |
| 1948 | 18 |
| 1949 | 19 |
| 1950 | 11 |
| 1951 | 28 |
| 1952 | 18 |
| 1953 | 41 |
| 1954 | 21 |
| 1955 | 13 |
| 1956 | 14 |
| 1957 | 12 |
| 1958 | 14 |
| 1959 | 28 |
| 1960 | 26 |
| 1961 | 34 |
| 1962 | 28 |
| 1963 | 9 |
| 1965 | 7 |
| 1966 | 5 |
| 1967 | 16 |
| 1968 | 18 |
| 1969 | 11 |
| 1970 | 23 |
| 1971 | 31 |
| 1972 | 35 |
| 1973 | 5 |
| 1974 | 7 |
| 1975 | 7 |
| 1977 | 5 |
| 1979 | 10 |
| 1982 | 5 |