| Year | Count |
|---|---|
| 1916 | 8 |
| 1917 | 5 |
| 1924 | 5 |
| 1925 | 5 |
| 1929 | 8 |
| 1930 | 6 |
| 1931 | 7 |
| 1932 | 5 |
| 1934 | 6 |
| 1937 | 6 |
| 1938 | 5 |
| 1939 | 8 |
| 1942 | 6 |
| 1950 | 5 |
| 1954 | 6 |
| 1955 | 9 |
| 1956 | 6 |
| 1957 | 6 |
| 1958 | 9 |
| 1959 | 7 |
| 1960 | 11 |
| 1961 | 6 |
| 1963 | 6 |
| 1964 | 8 |
| 1965 | 9 |
| 1966 | 5 |
| 1967 | 5 |
| 1968 | 11 |
| 1969 | 13 |
| 1970 | 18 |
| 1971 | 14 |
| 1972 | 17 |
| 1973 | 20 |
| 1974 | 6 |
| 1975 | 8 |
| 1976 | 14 |
| 1977 | 11 |
| 1978 | 10 |
| 1979 | 9 |
| 1980 | 9 |
| 1981 | 6 |
| 1982 | 13 |
| 1984 | 10 |
| 1985 | 9 |
| 1986 | 9 |
| 1987 | 6 |
| 1989 | 9 |
| 1990 | 5 |
| 1992 | 5 |
| 1993 | 5 |
| 1995 | 5 |
| 1997 | 5 |
| 2002 | 5 |
| 2004 | 5 |
| 2015 | 10 |