| Year | Count |
|---|---|
| 1946 | 18 |
| 1947 | 10 |
| 1948 | 8 |
| 1949 | 15 |
| 1950 | 59 |
| 1951 | 55 |
| 1952 | 37 |
| 1953 | 39 |
| 1954 | 69 |
| 1955 | 164 |
| 1956 | 201 |
| 1957 | 188 |
| 1958 | 102 |
| 1959 | 100 |
| 1960 | 96 |
| 1961 | 123 |
| 1962 | 232 |
| 1963 | 268 |
| 1964 | 377 |
| 1965 | 491 |
| 1966 | 353 |
| 1967 | 308 |
| 1968 | 238 |
| 1969 | 181 |
| 1970 | 138 |
| 1971 | 130 |
| 1972 | 112 |
| 1973 | 92 |
| 1974 | 94 |
| 1975 | 57 |
| 1976 | 76 |
| 1977 | 48 |
| 1978 | 62 |
| 1979 | 50 |
| 1980 | 56 |
| 1981 | 50 |
| 1982 | 27 |
| 1983 | 8 |
| 1984 | 65 |
| 1985 | 30 |
| 1986 | 10 |
| 1987 | 6 |
| 1988 | 21 |
| 1990 | 5 |
| 1991 | 15 |
| 1992 | 6 |
| 1995 | 5 |
| 2002 | 5 |
| 2013 | 10 |
| 2016 | 25 |
| 2017 | 10 |
| 2018 | 21 |
| 2019 | 56 |
| 2020 | 10 |
| 2021 | 47 |
| 2022 | 79 |
| 2023 | 95 |
| 2024 | 80 |