34% (1971)

54% (1983)

37% (1974)

41% (1985)

32% (1984)

34% (1977)

33% (1972)

35% (1983)

31% (1981)

65% (1967)

47% (1982)

33% (1974)

32% (1980)

33% (1979)

44% (1970)

20% (1967)

15% (1978)

10% (1964)

90% (1975)

30% (1968)