| Year | Count |
|---|---|
| 1914 | 7 |
| 1915 | 6 |
| 1917 | 6 |
| 1918 | 5 |
| 1922 | 5 |
| 1923 | 6 |
| 1960 | 5 |
| 1963 | 5 |
| 1964 | 7 |
| 1965 | 5 |
| 1966 | 7 |
| 1967 | 5 |
| 1968 | 5 |
| 1969 | 15 |
| 1970 | 5 |
| 1971 | 8 |
| 1973 | 6 |
| 1974 | 9 |
| 1975 | 15 |
| 1976 | 8 |
| 1977 | 9 |
| 1978 | 8 |
| 1979 | 9 |
| 1980 | 9 |
| 1982 | 5 |
| 1983 | 6 |
| 1985 | 7 |
| 1986 | 10 |
| 1989 | 8 |
| 1990 | 8 |
| 1992 | 6 |
| 1993 | 8 |
| 1994 | 5 |
| 1996 | 8 |
| 1997 | 6 |
| 1998 | 6 |
| 2000 | 7 |
| 2004 | 6 |
| 2007 | 5 |
| 2010 | 5 |
| 2015 | 14 |
| 2016 | 10 |