76% (2006)

68% (1999)

37% (2004)

62% (2000)

71% (2003)

72% (2007)

76% (2001)

76% (2011)

66% (2009)

75% (2006)

68% (2010)

63% (2008)

51% (1996)

66% (2009)

20% (2002)

66% (2002)

52% (2004)

65% (2004)

67% (2008)

64% (2007)