75% (1962)

45% (1971)

63% (1974)

60% (1990)

80% (1980)

75% (1992)

90% (1972)

80% (1983)

0% (1974)

90% (1975)

80% (1972)

0% (1975)

0% (1979)

60% (1984)

65% (1980)

80% (1979)

10% (1979)