82% (1985)

67% (1975)

80% (1984)

73% (1974)

60% (1981)

0% (1972)

48% (1983)

60% (1986)

38% (1990)

50% (1983)

0% (1988)

50% (1971)

47% (1975)

45% (1987)

60% (1962)

61% (1959)

53% (1987)

60% (1969)

50% (1979)

0% (1975)