How come the 1949 World Almanac didn't know 6,000,000 Jews were killed in the Holocaust?

The World Almanac and Book of Facts is an American-published reference work and is the bestselling almanac conveying information about such subjects as world changes, tragedies, sports feats, etc. It has been published yearly since 1868. ______________ Worldwide Populations - 1933 World Almanac ..15,315,000... show more The World Almanac and Book of Facts is an American-published reference work and is the bestselling almanac conveying information about such subjects as world changes, tragedies, sports feats, etc. It has been published yearly since 1868.
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Worldwide Populations - 1933 World Almanac

..15,315,000 Jews
682,400,000 Christians

Scanned image - http://www.biblestudysite.com/jews1933.j...
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Worldwide Populations - 1949 World Almanac

..15,753,638 Jews........(up.........438,638 on 1934)
592,406,542 Christians (down 89,993,458 on 1934)

Scanned image - http://www.biblestudysite.com/jews1948.j...
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