| Year | Count |
|---|---|
| 1922 | 5 |
| 1924 | 6 |
| 1951 | 6 |
| 1954 | 7 |
| 1955 | 14 |
| 1956 | 14 |
| 1957 | 27 |
| 1958 | 35 |
| 1959 | 38 |
| 1960 | 34 |
| 1961 | 28 |
| 1962 | 23 |
| 1963 | 36 |
| 1964 | 33 |
| 1965 | 21 |
| 1966 | 25 |
| 1967 | 20 |
| 1968 | 31 |
| 1969 | 22 |
| 1970 | 15 |
| 1971 | 18 |
| 1972 | 14 |
| 1973 | 11 |
| 1974 | 9 |
| 1976 | 5 |
| 1977 | 9 |
| 1980 | 5 |
| 1984 | 7 |
| 1985 | 7 |
| 1988 | 5 |
| 1989 | 6 |
| 1991 | 7 |
| 1999 | 5 |
| 2002 | 5 |
| 2003 | 5 |
| 2006 | 8 |
| 2007 | 10 |
| 2010 | 5 |
| 2013 | 6 |
| 2016 | 12 |
| 2017 | 10 |
| 2018 | 10 |
| 2021 | 6 |
| 2023 | 5 |