81% (1960)

65% (2000)

70% (1988)

60% (1987)

58% (1967)

67% (1968)

75% (1987)

71% (1986)

70% (1964)

64% (2014)

69% (1987)

65% (1958)

58% (1986)

57% (1987)

66% (1988)

63% (1990)

57% (2012)

60% (1965)

45% (1990)

59% (1985)