| Year | Count |
|---|---|
| 1914 | 7 |
| 1923 | 5 |
| 1957 | 5 |
| 1958 | 7 |
| 1962 | 11 |
| 1963 | 12 |
| 1964 | 9 |
| 1965 | 17 |
| 1966 | 16 |
| 1967 | 6 |
| 1968 | 11 |
| 1969 | 11 |
| 1970 | 8 |
| 1971 | 8 |
| 1972 | 12 |
| 1973 | 9 |
| 1974 | 7 |
| 1975 | 24 |
| 1976 | 16 |
| 1977 | 12 |
| 1978 | 14 |
| 1979 | 10 |
| 1981 | 22 |
| 1982 | 14 |
| 1983 | 16 |
| 1984 | 16 |
| 1985 | 14 |
| 1986 | 12 |
| 1987 | 12 |
| 1991 | 6 |
| 1993 | 27 |
| 1995 | 21 |
| 1997 | 15 |
| 1999 | 18 |
| 2002 | 5 |
| 2003 | 10 |