78% (2008)

70% (2009)

69% (1997)

69% (2007)

78% (2002)

57% (2001)

71% (2013)

75% (2008)

66% (1999)

65% (2003)

72% (2008)

70% (2009)

52% (2005)

66% (2001)

63% (2001)

67% (2004)

60% (2003)

74% (2004)

68% (2004)

55% (2002)