78% (2002)

66% (2005)

71% (2009)

70% (1997)

78% (2008)

69% (2007)

65% (2001)

72% (2008)

75% (2003)

70% (2002)

68% (2004)

57% (2001)

53% (2005)

63% (2010)

62% (2001)

60% (2003)

60% (2000)

64% (2006)

55% (2005)

75% (2004)