60% (1971)

0% (1976)

50% (1975)

53% (1974)

40% (1980)

57% (1971)

65% (1974)

35% (1971)

0% (1975)

60% (1975)

40% (1978)

35% (1971)

0% (1971)

76% (1977)

62% (1980)

37% (1976)

58% (1977)

65% (1971)

0% (1979)

30% (1977)