60% (1988)

49% (1961)

53% (1968)

85% (1956)

15% (1991)

41% (1979)

60% (1977)

30% (1976)

40% (1976)

53% (1987)

47% (1964)

52% (1982)

45% (1980)

70% (1983)

0% (1986)

52% (1938)

60% (1949)

63% (1978)

0% (1974)

60% (1968)