57% (1975)

0% (1977)

0% (1961)

58% (1988)

53% (1973)

65% (1987)

50% (1976)

61% (1971)

0% (1979)

66% (1976)

80% (1961)

40% (1973)

69% (1986)

0% (1978)

64% (1980)

44% (1975)

69% (1968)

60% (1968)

68% (1984)

70% (1967)