63% (2001)

78% (2004)

74% (1998)

62% (2009)

69% (1992)

65% (2008)

70% (2006)

68% (1999)

68% (2010)

68% (2004)

67% (2010)

67% (2001)

71% (2001)

59% (1999)

59% (2003)

67% (2002)

72% (2005)

54% (2004)

53% (1998)

69% (2006)