55% (1977)

69% (1957)

41% (1977)

49% (1970)

27% (1971)

57% (1972)

35% (1972)

88% (1960)

55% (1969)

0% (1973)

50% (1964)

0% (1975)

30% (1971)

74% (1972)

42% (1970)

52% (1973)

10% (1972)

45% (1959)

50% (1971)

35% (1971)