| Year | Count |
|---|---|
| 1930 | 7 |
| 1940 | 8 |
| 1941 | 5 |
| 1945 | 9 |
| 1947 | 18 |
| 1948 | 6 |
| 1949 | 7 |
| 1955 | 15 |
| 1957 | 18 |
| 1958 | 12 |
| 1960 | 5 |
| 1965 | 10 |
| 1966 | 5 |
| 1967 | 12 |
| 1968 | 18 |
| 1969 | 5 |
| 1970 | 6 |
| 1971 | 9 |
| 1972 | 6 |
| 1973 | 10 |
| 1974 | 12 |
| 1975 | 6 |
| 1976 | 7 |
| 1977 | 10 |
| 1979 | 7 |
| 1982 | 6 |
| 1983 | 5 |
| 1984 | 10 |
| 1985 | 6 |
| 1986 | 5 |
| 1988 | 6 |
| 1989 | 8 |
| 1990 | 9 |
| 1991 | 9 |
| 1992 | 12 |
| 1993 | 7 |
| 1994 | 6 |
| 1995 | 7 |
| 1996 | 8 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 5 |
| 2007 | 5 |
| 2008 | 6 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 10 |
| 2024 | 9 |