59% (1964)

56% (1989)

56% (1971)

42% (1992)

35% (1984)

27% (1986)

0% (1986)

80% (1965)

61% (1971)

63% (1972)

54% (1983)

61% (1972)

44% (1975)

55% (1968)

35% (1974)

50% (1970)

60% (1982)

44% (1975)

56% (1971)

62% (1980)