20% (1984)

52% (1994)

62% (1974)

36% (1988)

50% (1991)

44% (1986)

49% (1974)

69% (1975)

48% (1975)

54% (1988)

46% (1990)

41% (1982)

66% (1987)

63% (1988)

56% (1972)

0% (1979)

56% (1986)

59% (1987)

0% (1976)

59% (1981)