74% (1985)

70% (1987)

83% (1985)

70% (1983)

67% (1997)

64% (2004)

59% (1984)

50% (1987)

52% (1986)

75% (1990)

66% (1987)

72% (1998)

61% (2007)

58% (1984)

67% (1985)

77% (1998)

50% (1984)

68% (1989)

42% (1986)

73% (1983)