| Year | Count |
|---|---|
| 1915 | 5 |
| 1919 | 6 |
| 1924 | 10 |
| 1925 | 12 |
| 1927 | 18 |
| 1931 | 6 |
| 1932 | 6 |
| 1935 | 5 |
| 1938 | 5 |
| 1939 | 5 |
| 1947 | 5 |
| 1953 | 5 |
| 1957 | 10 |
| 1960 | 18 |
| 1961 | 6 |
| 1962 | 8 |
| 1964 | 7 |
| 1966 | 8 |
| 1967 | 5 |
| 1968 | 9 |
| 1969 | 7 |
| 1970 | 5 |
| 1971 | 8 |
| 1972 | 6 |
| 1973 | 8 |
| 1974 | 11 |
| 1975 | 6 |
| 1976 | 8 |
| 1977 | 12 |
| 1978 | 18 |
| 1979 | 20 |
| 1982 | 6 |
| 1984 | 5 |
| 1985 | 5 |
| 1987 | 7 |
| 1989 | 6 |
| 1991 | 5 |
| 1992 | 5 |
| 1993 | 5 |
| 1994 | 5 |
| 1995 | 9 |
| 1999 | 6 |
| 2002 | 6 |
| 2003 | 5 |
| 2006 | 5 |
| 2007 | 6 |
| 2008 | 5 |
| 2011 | 6 |
| 2014 | 6 |
| 2018 | 10 |
| 2023 | 10 |
| 2024 | 10 |