54% (1978)

74% (1971)

19% (1956)

36% (1974)

50% (1972)

52% (1980)

70% (1977)

85% (1988)

68% (1966)

72% (1968)

60% (1970)

66% (1961)

0% (1978)

82% (1962)

58% (1968)

0% (1987)

20% (1973)

74% (1959)

70% (1982)

50% (1988)