76% (2006)

74% (2006)

68% (1999)

37% (2004)

71% (2003)

73% (1995)

61% (2000)

75% (2011)

72% (2007)

69% (2005)

66% (2007)

74% (2006)

69% (2010)

62% (1997)

67% (2009)

65% (2002)

51% (1996)

52% (2004)

66% (2009)

65% (2004)