| Year | Count |
|---|---|
| 1913 | 5 |
| 1915 | 8 |
| 1917 | 5 |
| 1921 | 5 |
| 1922 | 13 |
| 1924 | 10 |
| 1925 | 5 |
| 1926 | 7 |
| 1929 | 14 |
| 1931 | 8 |
| 1936 | 6 |
| 1937 | 5 |
| 1940 | 13 |
| 1941 | 7 |
| 1942 | 10 |
| 1943 | 7 |
| 1946 | 9 |
| 1949 | 5 |
| 1950 | 5 |
| 1953 | 8 |
| 1955 | 6 |
| 1956 | 20 |
| 1957 | 16 |
| 1958 | 20 |
| 1959 | 6 |
| 1960 | 9 |
| 1961 | 12 |
| 1962 | 10 |
| 1963 | 6 |
| 1964 | 11 |
| 1965 | 19 |
| 1966 | 14 |
| 1967 | 9 |
| 1968 | 11 |
| 1969 | 10 |
| 1970 | 12 |
| 1971 | 12 |
| 1972 | 11 |
| 1974 | 5 |
| 1975 | 6 |
| 1977 | 5 |
| 1980 | 10 |
| 1981 | 13 |
| 1982 | 5 |
| 1983 | 5 |
| 1986 | 5 |
| 1988 | 7 |
| 1990 | 11 |
| 1992 | 5 |
| 1993 | 6 |
| 1996 | 5 |
| 1998 | 6 |
| 2007 | 5 |
| 2008 | 5 |