73% (1985)

70% (1987)

83% (1985)

68% (1997)

66% (1987)

71% (1983)

47% (1985)

74% (1990)

58% (1984)

64% (2004)

72% (1998)

63% (1999)

73% (1983)

67% (1994)

50% (1987)

77% (1998)

42% (1986)

58% (1984)

52% (1986)

61% (2007)