| Year | Count |
|---|---|
| 1940 | 5 |
| 1944 | 5 |
| 1950 | 5 |
| 1951 | 5 |
| 1954 | 10 |
| 1957 | 16 |
| 1959 | 5 |
| 1960 | 12 |
| 1962 | 6 |
| 1964 | 7 |
| 1966 | 17 |
| 1967 | 6 |
| 1972 | 15 |
| 1975 | 12 |
| 1976 | 49 |
| 1977 | 16 |
| 1978 | 7 |
| 1980 | 6 |
| 1981 | 6 |
| 1982 | 12 |
| 1983 | 5 |
| 1984 | 5 |
| 1987 | 31 |
| 1988 | 15 |
| 1989 | 10 |
| 1995 | 5 |
| 2007 | 5 |
| 2008 | 10 |
| 2011 | 5 |
| 2012 | 10 |
| 2015 | 6 |
| 2017 | 16 |
| 2018 | 18 |
| 2019 | 8 |
| 2020 | 10 |
| 2021 | 6 |
| 2022 | 20 |
| 2023 | 10 |
| 2024 | 18 |