76% (2006)

82% (2006)

75% (1990)

77% (2002)

72% (2009)

79% (1993)

70% (2001)

65% (2014)

60% (1999)

62% (2011)

69% (1998)

71% (1997)

67% (1997)

71% (1997)

69% (2006)

64% (2002)

72% (2000)

63% (2004)

67% (2008)

75% (1988)