51% (1988)

47% (1960)

65% (1990)

57% (1990)

66% (1989)

70% (1946)

47% (1976)

64% (1980)

63% (1957)

55% (1972)

59% (1967)

60% (1973)

68% (1954)

67% (1979)

62% (1982)

51% (1966)

58% (1971)

57% (1989)

66% (1964)

64% (1964)