| Year | Count |
|---|---|
| 1914 | 5 |
| 1917 | 5 |
| 1928 | 6 |
| 1929 | 5 |
| 1932 | 7 |
| 1934 | 5 |
| 1935 | 6 |
| 1936 | 7 |
| 1937 | 7 |
| 1938 | 24 |
| 1940 | 18 |
| 1941 | 15 |
| 1942 | 24 |
| 1943 | 22 |
| 1944 | 6 |
| 1945 | 23 |
| 1946 | 21 |
| 1947 | 35 |
| 1948 | 16 |
| 1949 | 20 |
| 1950 | 9 |
| 1951 | 31 |
| 1952 | 10 |
| 1953 | 31 |
| 1954 | 10 |
| 1956 | 10 |
| 1957 | 8 |
| 1958 | 14 |
| 1959 | 5 |
| 1960 | 17 |
| 1961 | 20 |
| 1962 | 7 |
| 1963 | 7 |
| 1964 | 9 |
| 1969 | 5 |
| 1972 | 7 |
| 1974 | 5 |
| 1976 | 12 |
| 1979 | 14 |