47% (1966)

54% (1966)

46% (1969)

69% (1973)

50% (1969)

60% (1969)

50% (1972)

63% (1972)

58% (1972)

70% (1970)

55% (1967)

55% (1965)

47% (1970)

60% (1973)

55% (1969)

51% (1970)

35% (1969)

52% (1970)

60% (1966)