57% (1982)

65% (1970)

54% (1978)

44% (1980)

53% (1979)

50% (1979)

54% (1980)

45% (1978)

69% (1977)

38% (1972)

28% (2000)

59% (1975)

72% (1980)

48% (1976)

60% (1980)

48% (1977)

38% (1977)

43% (1974)

45% (1982)

59% (1983)