64% (2006)

62% (2013)

71% (2010)

59% (2009)

68% (2003)

65% (2005)

57% (2003)

54% (2007)

64% (2010)

47% (2008)

50% (2006)

52% (2002)

73% (2008)

34% (2008)

85% (1983)

56% (1967)

50% (2009)

52% (2005)

52% (2004)

40% (2001)