49% (1960)

90% (1972)

60% (1974)

55% (1981)

46% (1986)

10% (1985)

61% (1980)

38% (1985)

53% (1970)

30% (1982)

0% (1966)

46% (1985)

64% (1981)

43% (1976)

48% (1983)

80% (1964)

65% (1968)

40% (1985)

34% (1988)

0% (1972)