| Year | Count |
|---|---|
| 1943 | 5 |
| 1948 | 7 |
| 1950 | 6 |
| 1953 | 5 |
| 1955 | 5 |
| 1956 | 6 |
| 1957 | 7 |
| 1958 | 5 |
| 1960 | 7 |
| 1961 | 6 |
| 1962 | 12 |
| 1963 | 9 |
| 1964 | 7 |
| 1965 | 10 |
| 1967 | 5 |
| 1968 | 6 |
| 1969 | 12 |
| 1971 | 5 |
| 1972 | 6 |
| 1973 | 7 |
| 1974 | 5 |
| 1977 | 7 |
| 1978 | 9 |
| 1981 | 10 |
| 1982 | 6 |
| 1983 | 7 |
| 1987 | 7 |
| 1988 | 6 |
| 1989 | 6 |
| 1990 | 5 |
| 1992 | 5 |
| 1993 | 5 |
| 1995 | 5 |
| 1996 | 6 |
| 1999 | 8 |
| 2007 | 9 |
| 2008 | 9 |
| 2010 | 5 |
| 2011 | 13 |
| 2012 | 13 |
| 2013 | 10 |
| 2014 | 18 |
| 2015 | 15 |
| 2016 | 38 |
| 2017 | 56 |
| 2018 | 74 |
| 2019 | 58 |
| 2020 | 18 |
| 2021 | 31 |
| 2022 | 27 |
| 2023 | 31 |
| 2024 | 39 |