Statistics
| Year | Design |
|---|---|
| 1961 | 1 |
| 1964 | 1 |
| 1965 | 5 |
| 1966 | 5 |
| 1967 | 9 |
| 1968 | 5 |
| 1969 | 8 |
| 1970 | 14 |
| 1971 | 14 |
| 1972 | 18 |
| 1973 | 25 |
| 1974 | 17 |
| 1975 | 19 |
| 1976 | 22 |
| 1977 | 21 |
| 1978 | 28 |
| 1979 | 28 |
| 1980 | 25 |
| 1981 | 24 |
| 1982 | 21 |
| 1983 | 14 |
| 1984 | 10 |
| 1985 | 1 |
| 1986 | 1 |
| 1989 | 1 |
| Year | Design |
|---|---|
| 1961 | 1 |
| 1964 | 1 |
| 1965 | 5 |
| 1966 | 5 |
| 1967 | 9 |
| 1968 | 5 |
| 1969 | 8 |
| 1970 | 14 |
| 1971 | 14 |
| 1972 | 18 |
| 1973 | 25 |
| 1974 | 17 |
| 1975 | 19 |
| 1976 | 22 |
| 1977 | 21 |
| 1978 | 28 |
| 1979 | 28 |
| 1980 | 25 |
| 1981 | 24 |
| 1982 | 21 |
| 1983 | 14 |
| 1984 | 10 |
| 1985 | 1 |
| 1986 | 1 |
| 1989 | 1 |