41% (1997)

55% (1973)

53% (1982)

70% (1976)

61% (1975)

39% (1980)

45% (1970)

54% (1977)

20% (1989)

32% (1990)

64% (1976)

58% (1969)

56% (1977)

61% (1974)

52% (1970)

50% (1973)

0% (1977)

37% (1973)

10% (1973)

57% (1972)