64% (1976)

68% (1970)

80% (1965)

56% (1969)

0% (1967)

57% (1973)

55% (1969)

54% (1978)

67% (1972)

10% (1972)

69% (1975)

0% (1967)

69% (1972)

0% (1967)

60% (1978)

47% (1970)

0% (1966)

50% (1972)

50% (1974)

73% (1975)