79% (1999)

74% (1990)

60% (2009)

39% (2009)

86% (2005)

80% (2002)

80% (2009)

83% (2011)

83% (2004)

70% (2009)

71% (1993)

78% (2006)

54% (1992)

75% (2008)

49% (2010)

67% (2010)

51% (2011)

62% (2011)

76% (2009)

64% (2010)