56% (1993)

77% (1989)

72% (1992)

71% (1987)

65% (1992)

73% (1987)

61% (1993)

75% (1986)

64% (1993)

52% (1997)

63% (2011)

64% (1989)

62% (1996)

66% (2002)

54% (2001)

64% (1992)

72% (1995)

54% (1994)

71% (1993)

74% (1993)