40% (1987)

28% (1985)

43% (1987)

53% (1983)

55% (1993)

54% (1971)

39% (1986)

59% (1986)

54% (1981)

55% (1990)

46% (1994)

52% (1969)

50% (1988)

29% (1987)

51% (1985)

23% (1990)

52% (1990)

40% (1975)

58% (1985)

37% (1985)