| Year | Count |
|---|---|
| 1947 | 5 |
| 1963 | 15 |
| 1964 | 40 |
| 1965 | 189 |
| 1966 | 171 |
| 1967 | 218 |
| 1968 | 437 |
| 1969 | 548 |
| 1970 | 453 |
| 1971 | 364 |
| 1972 | 288 |
| 1973 | 224 |
| 1974 | 178 |
| 1975 | 139 |
| 1976 | 103 |
| 1977 | 114 |
| 1978 | 65 |
| 1979 | 40 |
| 1980 | 34 |
| 1981 | 46 |
| 1982 | 7 |
| 1983 | 27 |
| 1984 | 6 |
| 1988 | 10 |
| 1995 | 5 |
| 2021 | 10 |
| 2022 | 20 |
| 2023 | 7 |
| 2024 | 10 |