| Year | Count |
|---|---|
| 1914 | 7 |
| 1915 | 5 |
| 1917 | 6 |
| 1919 | 7 |
| 1922 | 8 |
| 1923 | 9 |
| 1924 | 8 |
| 1925 | 6 |
| 1927 | 5 |
| 1929 | 10 |
| 1930 | 5 |
| 1939 | 8 |
| 1940 | 6 |
| 1941 | 7 |
| 1942 | 7 |
| 1944 | 10 |
| 1945 | 10 |
| 1946 | 8 |
| 1947 | 36 |
| 1948 | 6 |
| 1949 | 10 |
| 1956 | 10 |
| 1958 | 16 |
| 1960 | 10 |
| 1963 | 10 |
| 1965 | 12 |
| 1970 | 6 |
| 1972 | 5 |
| 1974 | 5 |
| 1978 | 5 |
| 1979 | 5 |
| 1983 | 5 |
| 1987 | 8 |
| 1997 | 7 |