50% (1973)

30% (1972)

57% (1963)

63% (1929)

73% (1981)

50% (1960)

65% (1962)

70% (1964)

50% (1970)

0% (1967)

59% (1963)

55% (1959)

50% (1969)

50% (1960)

58% (1964)

30% (1971)

10% (1957)

10% (1972)

0% (1963)

85% (1967)