82% (1986)

81% (1979)

53% (1981)

72% (1990)

65% (1982)

70% (1975)

64% (1980)

70% (1980)

60% (1980)

70% (1979)

50% (1989)

60% (1979)

0% (1985)

62% (1982)

60% (1979)

66% (1978)

63% (1979)

72% (1976)

70% (1988)

85% (1985)