28% (1982)

65% (1990)

41% (1956)

70% (1961)

68% (1961)

0% (1989)

54% (1991)

69% (1986)

53% (1976)

35% (1976)

79% (1988)

73% (1969)

70% (1986)

62% (1967)

68% (1947)

59% (1985)

69% (1976)

68% (1966)

52% (1988)

32% (1988)