71% (1999)

62% (2011)

37% (2007)

55% (2004)

53% (1996)

65% (2008)

66% (2003)

65% (1994)

78% (2001)

37% (2005)

64% (2010)

48% (2011)

74% (2006)

58% (2004)

55% (1994)

63% (2010)

50% (1994)

65% (2004)

55% (1996)

27% (2007)