58% (1979)

59% (1982)

70% (1972)

57% (1983)

63% (1980)

62% (1978)

73% (1982)

46% (1995)

54% (1988)

52% (1975)

65% (1986)

58% (1995)

64% (1978)

55% (1996)

35% (1985)

55% (1982)

70% (1979)

65% (1993)

60% (1986)

46% (1975)