62% (1968)

70% (1965)

69% (1976)

67% (1974)

76% (1977)

70% (1987)

69% (1985)

62% (1988)

68% (1954)

62% (1974)

0% (1929)

69% (1969)

30% (1981)

59% (1987)

45% (1959)

69% (1989)

42% (1968)

70% (1980)

90% (1976)

50% (1968)