10% (1971)

60% (1966)

75% (1984)

65% (1980)

0% (1985)

55% (1979)

77% (1983)

0% (1978)

0% (1976)

80% (1988)

90% (1989)

45% (1980)

0% (1985)

0% (1986)

0% (1981)

0% (1992)

70% (1981)

77% (1990)

0% (1975)

80% (1972)