| Year | Count |
|---|---|
| 1920 | 7 |
| 1921 | 7 |
| 1930 | 14 |
| 1933 | 5 |
| 1937 | 5 |
| 1941 | 5 |
| 1943 | 5 |
| 1946 | 7 |
| 1947 | 5 |
| 1948 | 13 |
| 1950 | 10 |
| 1952 | 8 |
| 1953 | 15 |
| 1954 | 6 |
| 1955 | 15 |
| 1956 | 13 |
| 1957 | 5 |
| 1958 | 32 |
| 1959 | 26 |
| 1960 | 20 |
| 1961 | 19 |
| 1962 | 12 |
| 1963 | 11 |
| 1964 | 14 |
| 1964 | 5 |
| 1965 | 16 |
| 1966 | 5 |
| 1967 | 8 |
| 1968 | 6 |
| 1969 | 5 |
| 1974 | 7 |
| 1975 | 10 |
| 1976 | 14 |
| 1977 | 10 |
| 1978 | 12 |
| 1980 | 14 |
| 1984 | 10 |
| 1987 | 12 |
| 1989 | 10 |
| 2009 | 5 |
| 2010 | 6 |
| 2012 | 14 |
| 2015 | 14 |
| 2016 | 12 |
| 2018 | 5 |
| 2019 | 8 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 7 |
| 2023 | 16 |