Thames Darwin wrote:...
It depends on what you're calling "Poland", doesn't it? If the number from 1921 is the 1921 borders, then it really depends on when the 3.5 million figure was devised. If it was 1939 before the war started, then it's only a growth rate of around 1%. If it's after Wartheland and Silesia were annexed back to the Reich, then it's definitely suspicious, unless it's after these Jews were resettled east. It really depends. But usually it's an apples to oranges comparison, which is automatically suspect.
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I think we had that covered somewhere? Apparently there were newspaper articles on that from the time. Jews in East Poland, Ukraine, Belarus being evacuated East.