20% (1976)

56% (1967)

43% (1976)

50% (1982)

80% (1969)

46% (1970)

58% (1978)

35% (1970)

72% (1960)

40% (1966)

60% (1963)

51% (1973)

59% (1975)

52% (1978)

0% (1958)

10% (1975)

56% (1965)

52% (1977)

0% (1957)

52% (1971)