58% (1988)

74% (2009)

50% (2002)

76% (1997)

77% (2000)

65% (1975)

83% (2006)

70% (2006)

73% (2015)

81% (1999)

74% (2001)

55% (1956)

55% (1961)

50% (2005)

82% (2009)

77% (1960)

72% (2014)

71% (2016)

71% (2015)

70% (1985)