20% (1984)

66% (1971)

71% (1991)

57% (1960)

0% (1964)

10% (1981)

53% (1972)

85% (1971)

53% (1973)

55% (1984)

31% (1990)

47% (1938)

68% (1956)

30% (1970)

50% (1973)

55% (1972)

30% (1986)

65% (1975)

40% (1991)

0% (1968)