56% (1971)

80% (1965)

57% (1964)

56% (1971)

55% (1989)

60% (1982)

27% (1986)

61% (1971)

61% (1972)

35% (1984)

35% (1974)

54% (1983)

42% (1992)

45% (1975)

44% (1975)

43% (1979)

55% (1968)

61% (1972)

50% (1970)

30% (1973)