30% (1973)

0% (1966)

60% (1973)

70% (1975)

80% (1965)

56% (1969)

50% (1972)

0% (1977)

10% (1975)

0% (1974)

73% (1975)

68% (1970)

0% (1967)

50% (1973)

54% (1978)

0% (1971)

50% (1974)

0% (1967)

57% (1973)

45% (1974)