60% (1960)

80% (1958)

70% (1982)

60% (1961)

39% (1988)

42% (1984)

52% (1988)

10% (1966)

0% (1967)

80% (1959)

55% (1972)

65% (1982)

50% (1958)

56% (1972)

37% (1976)

72% (1968)

50% (1977)

43% (1982)

48% (1975)

63% (1982)