64% (2015)

77% (2003)

64% (1993)

53% (2015)

68% (2005)

69% (2001)

83% (2005)

74% (2000)

67% (1968)

61% (1954)

72% (2002)

55% (1956)

77% (2000)

73% (1988)

65% (1954)

34% (2010)

71% (1993)

84% (2008)

75% (2003)

72% (2013)