68% (1963)

52% (1972)

50% (1979)

0% (1958)

10% (1973)

0% (1955)

0% (1986)

60% (1988)

50% (1974)

65% (1949)

51% (1979)

10% (1980)

72% (1972)

0% (1991)

70% (1955)

64% (1963)

65% (1977)

60% (1979)

70% (1991)

60% (1980)