71% (2013)

71% (2008)

59% (2007)

79% (2008)

49% (2014)

50% (2012)

54% (2014)

56% (2008)

56% (1980)

56% (1997)

53% (2004)

76% (2008)

46% (2012)

78% (2008)

43% (2003)

35% (2005)

56% (2011)

33% (2010)

66% (2002)

65% (2001)