| Year | Count |
|---|---|
| 1918 | 7 |
| 1919 | 6 |
| 1920 | 8 |
| 1921 | 7 |
| 1923 | 11 |
| 1924 | 8 |
| 1925 | 12 |
| 1928 | 6 |
| 1929 | 6 |
| 1930 | 9 |
| 1937 | 5 |
| 1939 | 6 |
| 1940 | 5 |
| 1941 | 9 |
| 1942 | 5 |
| 1943 | 6 |
| 1944 | 8 |
| 1945 | 7 |
| 1946 | 5 |
| 1948 | 12 |
| 1949 | 6 |
| 1956 | 18 |
| 1957 | 10 |
| 1958 | 12 |
| 1959 | 12 |
| 1963 | 14 |
| 1964 | 16 |
| 1966 | 18 |
| 1967 | 12 |
| 1968 | 10 |
| 1970 | 5 |
| 1971 | 7 |
| 1972 | 5 |
| 1973 | 6 |
| 1974 | 6 |
| 1975 | 6 |
| 1976 | 5 |
| 1977 | 5 |
| 1979 | 8 |
| 1980 | 6 |
| 1981 | 9 |
| 1982 | 9 |
| 1983 | 6 |
| 1984 | 11 |
| 1985 | 5 |
| 1986 | 7 |
| 1987 | 13 |
| 1988 | 8 |
| 1992 | 12 |
| 1993 | 6 |
| 1994 | 5 |
| 1995 | 6 |
| 1996 | 6 |
| 1999 | 8 |
| 2001 | 18 |
| 2005 | 7 |
| 2006 | 6 |
| 2009 | 10 |
| 2022 | 5 |