73% (1963)

69% (1994)

65% (2011)

78% (1983)

65% (1985)

71% (1975)

63% (1997)

62% (1987)

57% (1979)

63% (1990)

85% (2004)

79% (1974)

46% (1974)

68% (2015)

72% (2014)

61% (1996)

60% (1966)

65% (2002)

64% (2012)

78% (1995)