68% (1981)

79% (1996)

73% (2001)

73% (1994)

86% (2000)

70% (2002)

43% (2002)

88% (2002)

79% (2002)

80% (1968)

60% (2007)

93% (2005)

60% (2004)

81% (1998)

78% (2015)

85% (2004)

83% (2005)

45% (2002)

73% (1978)

81% (2002)