80% (2010)

86% (2005)

52% (1999)

76% (2013)

71% (2012)

90% (1970)

72% (1989)

75% (2011)

71% (1990)

93% (1999)

82% (2000)

78% (1998)

87% (2007)

66% (2007)

71% (1993)

70% (2006)

72% (2008)

69% (2015)

74% (2014)

58% (1988)