63% (1981)

80% (1978)

63% (1983)

61% (1980)

66% (1982)

70% (1984)

74% (1978)

70% (1981)

0% (1979)

70% (1978)

50% (1978)

0% (1980)

64% (1983)

65% (1979)

75% (1978)

93% (1981)

70% (1980)

60% (1982)

70% (1979)

0% (1981)