71% (1985)

73% (1979)

67% (1980)

83% (1975)

68% (1975)

41% (1977)

69% (1984)

86% (1979)

73% (1969)

65% (1976)

80% (1981)

80% (1980)

70% (1980)

96% (1966)

77% (1987)

70% (1984)

80% (1982)

70% (1982)

0% (1975)

85% (1984)