| Year | Count |
|---|---|
| 1947 | 6 |
| 1948 | 5 |
| 1949 | 19 |
| 1950 | 12 |
| 1951 | 16 |
| 1952 | 5 |
| 1953 | 6 |
| 1954 | 23 |
| 1956 | 12 |
| 1957 | 5 |
| 1959 | 11 |
| 1960 | 25 |
| 1961 | 30 |
| 1962 | 10 |
| 1963 | 6 |
| 1964 | 25 |
| 1965 | 18 |
| 1966 | 26 |
| 1967 | 44 |
| 1968 | 36 |
| 1969 | 34 |
| 1970 | 30 |
| 1971 | 53 |
| 1972 | 52 |
| 1973 | 24 |
| 1975 | 20 |
| 1976 | 24 |
| 1977 | 20 |
| 1978 | 10 |
| 1979 | 10 |
| 1980 | 10 |
| 1982 | 17 |
| 1983 | 5 |
| 1987 | 15 |
| 1989 | 5 |
| 2006 | 10 |
| 2011 | 10 |
| 2012 | 11 |
| 2013 | 11 |
| 2014 | 17 |
| 2016 | 20 |
| 2018 | 33 |
| 2019 | 21 |
| 2020 | 38 |
| 2021 | 11 |
| 2022 | 28 |
| 2024 | 10 |