62% (2013)

66% (2005)

65% (2006)

70% (2010)

56% (2003)

68% (2003)

64% (2010)

53% (2007)

50% (2006)

53% (2002)

46% (2008)

60% (2009)

74% (2008)

52% (2004)

85% (1983)

52% (2005)

56% (1967)

34% (2008)

50% (2009)

40% (2001)