76% (1985)

75% (1981)

76% (1984)

66% (1982)

50% (1985)

43% (1983)

61% (1986)

42% (1986)

44% (1988)

50% (1984)

43% (1985)

0% (1985)

43% (1984)

67% (1984)

50% (1984)

65% (1984)

50% (1986)

70% (1983)

63% (1984)

34% (1983)