79% (1993)

76% (2006)

83% (2006)

75% (1990)

72% (2009)

70% (2001)

60% (1999)

65% (2014)

77% (2002)

68% (1998)

62% (2011)

68% (1997)

72% (2006)

64% (2002)

71% (1997)

76% (1988)

71% (1997)

65% (2004)

65% (2000)

74% (2002)