| Year | Count |
|---|---|
| 1942 | 6 |
| 1944 | 6 |
| 1945 | 6 |
| 1946 | 6 |
| 1948 | 5 |
| 1949 | 5 |
| 1951 | 5 |
| 1952 | 11 |
| 1954 | 7 |
| 1955 | 9 |
| 1956 | 9 |
| 1957 | 14 |
| 1958 | 22 |
| 1959 | 22 |
| 1960 | 32 |
| 1961 | 36 |
| 1962 | 13 |
| 1963 | 9 |
| 1965 | 6 |
| 1966 | 5 |
| 1967 | 8 |
| 1969 | 6 |
| 1972 | 8 |
| 1979 | 12 |
| 1988 | 5 |
| 2005 | 5 |
| 2006 | 5 |
| 2008 | 7 |
| 2009 | 6 |
| 2010 | 7 |
| 2011 | 5 |
| 2012 | 13 |
| 2013 | 9 |
| 2014 | 8 |
| 2015 | 21 |
| 2016 | 18 |
| 2018 | 18 |
| 2019 | 12 |
| 2020 | 16 |
| 2021 | 7 |
| 2022 | 24 |
| 2023 | 54 |
| 2024 | 32 |