| Year | Count |
|---|---|
| 1923 | 6 |
| 1944 | 5 |
| 1955 | 24 |
| 1957 | 6 |
| 1961 | 9 |
| 1962 | 5 |
| 1963 | 5 |
| 1964 | 7 |
| 1965 | 11 |
| 1966 | 5 |
| 1967 | 6 |
| 1968 | 15 |
| 1969 | 8 |
| 1970 | 6 |
| 1971 | 22 |
| 1972 | 10 |
| 1973 | 5 |
| 1974 | 10 |
| 1975 | 11 |
| 1976 | 6 |
| 1977 | 7 |
| 1980 | 12 |
| 1981 | 7 |
| 1982 | 14 |
| 1987 | 8 |
| 1990 | 10 |
| 1991 | 5 |
| 1992 | 6 |
| 1993 | 5 |
| 1995 | 12 |
| 1996 | 5 |
| 1998 | 10 |
| 1999 | 7 |
| 2000 | 6 |
| 2001 | 18 |
| 2003 | 5 |
| 2005 | 5 |
| 2006 | 5 |
| 2013 | 12 |
| 2020 | 5 |