| Year | Count |
|---|---|
| 1920 | 5 |
| 1922 | 5 |
| 1924 | 12 |
| 1925 | 5 |
| 1926 | 10 |
| 1927 | 14 |
| 1928 | 7 |
| 1930 | 10 |
| 1939 | 9 |
| 1941 | 5 |
| 1942 | 7 |
| 1943 | 6 |
| 1945 | 5 |
| 1946 | 7 |
| 1947 | 21 |
| 1948 | 11 |
| 1949 | 6 |
| 1954 | 18 |
| 1955 | 15 |
| 1957 | 15 |
| 1959 | 16 |
| 1960 | 10 |
| 1962 | 12 |
| 1963 | 18 |
| 1964 | 12 |
| 1965 | 12 |
| 1966 | 14 |
| 1969 | 16 |
| 1970 | 5 |
| 1971 | 6 |
| 1972 | 5 |
| 1974 | 5 |
| 1975 | 5 |
| 1977 | 9 |
| 1978 | 7 |
| 1980 | 5 |
| 1981 | 5 |
| 1982 | 6 |
| 1983 | 5 |
| 1985 | 13 |
| 1988 | 6 |
| 1989 | 6 |
| 1991 | 13 |
| 1992 | 8 |
| 1993 | 5 |
| 1994 | 7 |
| 2006 | 5 |
| 2008 | 5 |