41% (1977)

66% (1968)

59% (1985)

70% (1984)

44% (1980)

68% (1982)

93% (1977)

80% (1977)

64% (1987)

90% (1961)

50% (1987)

85% (1980)

100% (1973)

0% (1979)

0% (1965)

0% (1970)

10% (1978)

10% (1972)

0% (1965)

60% (1968)