63% (1981)

70% (1984)

70% (1981)

74% (1978)

61% (1980)

0% (1978)

64% (1981)

70% (1980)

0% (1980)

66% (1982)

65% (1979)

80% (1984)

50% (1978)

70% (1984)

85% (1980)

20% (1978)

63% (1983)

63% (1984)

78% (1980)

60% (1981)