50% (1984)

31% (1988)

51% (1972)

53% (1980)

73% (1988)

51% (1994)

53% (1983)

38% (1985)

53% (1980)

37% (1990)

60% (1988)

50% (1986)

69% (1970)

45% (1984)

62% (1984)

55% (1986)

40% (1984)

49% (1985)

33% (1991)

65% (1970)