39% (1968)

37% (1977)

53% (1962)

76% (1981)

32% (1985)

35% (1969)

47% (1969)

40% (1973)

48% (1978)

50% (1982)

10% (1970)

32% (1966)

0% (1963)

48% (1970)

40% (1971)

20% (1962)

72% (1961)

0% (1973)

20% (1972)

0% (1976)