20% (1976)

45% (1953)

40% (1983)

59% (1956)

48% (1942)

70% (1967)

80% (1972)

70% (1987)

68% (1980)

70% (1982)

38% (1978)

30% (1970)

70% (1979)

54% (1988)

47% (1982)

58% (1983)

50% (1980)

0% (1986)

80% (1959)

0% (1941)