61% (1971)

62% (1980)

0% (1979)

30% (1977)

35% (1971)

0% (1976)

70% (1974)

66% (1977)

76% (1977)

39% (1980)

60% (1975)

50% (1981)

57% (1971)

50% (1975)

37% (1976)

0% (1974)

53% (1974)

60% (1970)

40% (1978)

72% (1983)