| Year | Count |
|---|---|
| 1948 | 10 |
| 1949 | 7 |
| 1951 | 32 |
| 1952 | 33 |
| 1953 | 25 |
| 1954 | 82 |
| 1955 | 44 |
| 1956 | 64 |
| 1957 | 41 |
| 1959 | 11 |
| 1960 | 15 |
| 1961 | 5 |
| 1962 | 45 |
| 1963 | 108 |
| 1964 | 147 |
| 1965 | 79 |
| 1966 | 107 |
| 1967 | 103 |
| 1968 | 69 |
| 1969 | 73 |
| 1970 | 40 |
| 1971 | 33 |
| 1972 | 37 |
| 1973 | 42 |
| 1974 | 17 |
| 1975 | 19 |
| 1976 | 14 |
| 1977 | 10 |
| 1978 | 7 |
| 1979 | 5 |
| 1988 | 6 |
| 1990 | 6 |
| 1991 | 15 |
| 1992 | 8 |
| 1996 | 5 |
| 1999 | 5 |
| 2014 | 14 |
| 2019 | 6 |
| 2020 | 6 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 5 |