57% (1972)

55% (1977)

69% (1957)

45% (1977)

88% (1960)

0% (1975)

45% (1959)

50% (1971)

42% (1970)

27% (1971)

49% (1970)

73% (1972)

35% (1971)

35% (1972)

45% (1971)

52% (1973)

0% (1973)

55% (1969)

30% (1971)

10% (1972)