78% (1993)

83% (2006)

76% (2006)

72% (2009)

75% (1990)

69% (2001)

77% (2002)

70% (1997)

60% (1999)

69% (1998)

72% (2000)

67% (1997)

64% (2014)

76% (1988)

67% (1999)

67% (2002)

64% (2002)

71% (1997)

69% (2006)

68% (1992)