71% (1987)

66% (1987)

83% (1985)

74% (1985)

67% (1997)

73% (1983)

70% (1983)

52% (1986)

72% (1998)

64% (2004)

63% (1999)

59% (1984)

74% (1990)

68% (1989)

61% (2007)

65% (1989)

55% (2007)

51% (1984)

56% (1973)

77% (1998)