59% (1980)

56% (1983)

70% (1972)

58% (1978)

59% (1982)

69% (1977)

62% (1978)

47% (1995)

58% (1995)

73% (1982)

52% (1975)

65% (1986)

54% (1988)

61% (1980)

55% (1982)

38% (1985)

64% (1993)

60% (1999)

50% (1986)

50% (1979)