83% (2006)

75% (1990)

76% (2006)

72% (2009)

79% (1993)

77% (2002)

68% (1998)

70% (2001)

62% (2011)

68% (1997)

60% (1999)

65% (2014)

71% (1997)

71% (1997)

76% (1988)

64% (2002)

68% (2006)

72% (2000)

65% (2009)

62% (2009)