60% (1974)

70% (1987)

55% (1982)

53% (1984)

55% (1986)

63% (2000)

57% (1990)

59% (1986)

66% (1989)

65% (1978)

66% (1992)

69% (1988)

0% (1971)

40% (1976)

60% (1988)

66% (1982)

54% (2001)

80% (1990)

72% (1973)

62% (1984)