88% (2002)

79% (1996)

68% (1981)

86% (2000)

80% (1998)

82% (2005)

73% (1978)

69% (2004)

54% (2009)

80% (1999)

78% (2010)

80% (2002)

65% (2001)

78% (2013)

64% (2017)

43% (2002)

78% (2015)

72% (2011)

79% (2006)

75% (2003)