| Year | Count |
|---|---|
| 1937 | 5 |
| 1939 | 12 |
| 1941 | 8 |
| 1943 | 30 |
| 1950 | 27 |
| 1951 | 21 |
| 1952 | 23 |
| 1953 | 14 |
| 1954 | 16 |
| 1955 | 12 |
| 1956 | 17 |
| 1957 | 7 |
| 1958 | 23 |
| 1959 | 17 |
| 1960 | 13 |
| 1961 | 19 |
| 1967 | 12 |
| 1968 | 11 |
| 1969 | 14 |
| 1971 | 13 |
| 1972 | 10 |
| 1973 | 19 |
| 1974 | 13 |
| 1975 | 10 |
| 1976 | 6 |
| 1977 | 20 |
| 1978 | 13 |
| 1979 | 14 |
| 1980 | 11 |
| 1981 | 11 |
| 1982 | 7 |
| 1983 | 8 |
| 1984 | 5 |
| 1985 | 12 |
| 1986 | 14 |
| 1995 | 5 |
| 1996 | 7 |
| 2016 | 5 |
| 2020 | 6 |
| 2021 | 7 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 10 |