61% (1982)

60% (1985)

47% (1993)

55% (1987)

55% (1984)

68% (1972)

49% (1989)

47% (1989)

61% (1984)

63% (1983)

47% (1993)

68% (1970)

55% (1986)

63% (1983)

53% (1983)

49% (1983)

33% (1984)

61% (1986)

72% (1984)

56% (1986)