55% (1974)

65% (1986)

69% (1981)

42% (1987)

0% (1982)

47% (1978)

0% (1980)

73% (1980)

45% (1982)

8% (1979)

61% (1977)

50% (1986)

60% (1986)

50% (1986)

0% (1975)

70% (1986)

59% (1982)

50% (1975)

43% (1974)

65% (1980)