39% (1968)

35% (1969)

40% (1973)

47% (1969)

38% (1977)

50% (1982)

48% (1978)

77% (1981)

48% (1970)

40% (1975)

0% (1963)

54% (1962)

33% (1966)

10% (1970)

0% (1976)

32% (1985)

71% (1961)

20% (1972)

39% (1965)

60% (1964)