60% (1988)

70% (1990)

60% (1976)

50% (1990)

30% (1982)

0% (1965)

0% (1981)

65% (1970)

20% (1960)

60% (1974)

90% (1979)

0% (1979)

0% (1964)

0% (1971)

50% (1958)

63% (1970)

80% (1972)

70% (1972)

0% (1979)

0% (1988)