| Year | Count |
|---|---|
| 1914 | 8 |
| 1915 | 7 |
| 1917 | 6 |
| 1918 | 7 |
| 1920 | 9 |
| 1921 | 15 |
| 1922 | 15 |
| 1923 | 10 |
| 1924 | 7 |
| 1925 | 10 |
| 1926 | 9 |
| 1927 | 15 |
| 1928 | 16 |
| 1929 | 25 |
| 1930 | 6 |
| 1931 | 9 |
| 1941 | 14 |
| 1942 | 10 |
| 1943 | 12 |
| 1944 | 6 |
| 1945 | 8 |
| 1946 | 9 |
| 1947 | 24 |
| 1948 | 6 |
| 1954 | 15 |
| 1955 | 21 |
| 1957 | 14 |
| 1960 | 10 |
| 1962 | 12 |
| 1963 | 14 |
| 1965 | 14 |
| 1968 | 12 |
| 1971 | 7 |
| 1972 | 6 |
| 1974 | 5 |
| 1975 | 11 |
| 1976 | 5 |
| 1977 | 6 |
| 1979 | 5 |
| 1980 | 7 |
| 1981 | 6 |
| 1982 | 7 |
| 1985 | 5 |
| 1986 | 6 |
| 1988 | 6 |
| 1990 | 6 |
| 1991 | 8 |
| 1992 | 5 |
| 1993 | 6 |
| 1994 | 7 |
| 1997 | 5 |
| 1998 | 7 |
| 2005 | 5 |