| Year | Count |
|---|---|
| 1913 | 5 |
| 1916 | 5 |
| 1918 | 5 |
| 1922 | 5 |
| 1923 | 8 |
| 1924 | 6 |
| 1925 | 6 |
| 1927 | 6 |
| 1928 | 11 |
| 1929 | 13 |
| 1930 | 5 |
| 1939 | 9 |
| 1941 | 9 |
| 1943 | 12 |
| 1944 | 5 |
| 1945 | 11 |
| 1946 | 9 |
| 1947 | 27 |
| 1948 | 9 |
| 1955 | 15 |
| 1958 | 10 |
| 1959 | 12 |
| 1963 | 16 |
| 1964 | 16 |
| 1969 | 5 |
| 1972 | 6 |
| 1973 | 6 |
| 1976 | 5 |
| 1977 | 5 |
| 1978 | 8 |
| 1979 | 7 |
| 1981 | 5 |
| 1982 | 7 |
| 1986 | 7 |
| 1987 | 5 |
| 1990 | 8 |