| Year | Count |
|---|---|
| 1947 | 12 |
| 1950 | 5 |
| 1951 | 7 |
| 1952 | 16 |
| 1953 | 12 |
| 1954 | 22 |
| 1955 | 10 |
| 1956 | 6 |
| 1957 | 18 |
| 1958 | 42 |
| 1959 | 26 |
| 1960 | 54 |
| 1961 | 43 |
| 1962 | 76 |
| 1963 | 26 |
| 1964 | 48 |
| 1965 | 56 |
| 1966 | 24 |
| 1967 | 22 |
| 1968 | 57 |
| 1969 | 62 |
| 1970 | 45 |
| 1971 | 35 |
| 1972 | 26 |
| 1973 | 10 |
| 1974 | 33 |
| 1975 | 44 |
| 1976 | 12 |
| 1977 | 34 |
| 1978 | 20 |
| 1979 | 7 |
| 1980 | 33 |
| 1981 | 12 |
| 1982 | 15 |
| 1983 | 16 |
| 1984 | 32 |
| 1985 | 46 |
| 1986 | 41 |
| 1987 | 16 |
| 1989 | 10 |
| 1995 | 8 |
| 1996 | 9 |
| 1998 | 32 |
| 2003 | 10 |
| 2004 | 30 |
| 2006 | 11 |
| 2007 | 14 |
| 2008 | 26 |
| 2010 | 12 |
| 2011 | 10 |
| 2014 | 5 |
| 2015 | 8 |
| 2017 | 9 |
| 2018 | 8 |
| 2020 | 5 |
| 2021 | 10 |
| 2022 | 5 |
| 2024 | 5 |