33% (1988)

51% (1985)

66% (1989)

55% (1984)

53% (1976)

0% (1983)

64% (1986)

50% (1988)

63% (1987)

58% (1986)

65% (1987)

64% (1988)

70% (1986)

61% (1985)

36% (1985)

51% (1985)

38% (1976)

55% (1981)

43% (1987)

51% (1982)