83% (2006)

72% (2000)

75% (1990)

79% (1993)

76% (2006)

69% (1998)

70% (2001)

72% (2009)

65% (2000)

70% (1997)

68% (1997)

71% (1997)

76% (1988)

62% (1999)

74% (2002)

69% (2006)

71% (1998)

75% (2001)

64% (2014)

65% (1996)