| Year | Count |
|---|---|
| 1934 | 8 |
| 1935 | 16 |
| 1936 | 8 |
| 1937 | 11 |
| 1938 | 15 |
| 1939 | 54 |
| 1940 | 34 |
| 1941 | 61 |
| 1942 | 43 |
| 1943 | 127 |
| 1944 | 62 |
| 1945 | 43 |
| 1946 | 15 |
| 1947 | 82 |
| 1948 | 45 |
| 1949 | 56 |
| 1950 | 68 |
| 1951 | 94 |
| 1952 | 45 |
| 1953 | 42 |
| 1954 | 44 |
| 1955 | 22 |
| 1956 | 28 |
| 1957 | 25 |
| 1958 | 17 |
| 1959 | 19 |
| 1960 | 17 |
| 1961 | 7 |
| 1963 | 5 |
| 1969 | 6 |
| 1970 | 5 |
| 1973 | 5 |