61% (1986)

73% (1990)

54% (1995)

81% (1988)

60% (2004)

60% (1978)

55% (1994)

77% (2002)

81% (2014)

83% (2005)

76% (1992)

71% (1983)

76% (1990)

74% (1966)

72% (1996)

76% (1994)

82% (1995)

74% (2004)

64% (2008)

78% (2005)