59% (1980)

54% (1985)

0% (1979)

70% (1983)

58% (1979)

57% (1980)

80% (1982)

60% (1977)

0% (1978)

50% (1978)

60% (1979)

95% (1979)

0% (1977)

60% (1980)

78% (1986)

59% (1978)

0% (1978)

70% (1982)

0% (1977)

60% (1981)