What was the percentage of Americans with college degrees in 1940?

Recent data indicate that 33% of Americans now have 4-year degrees. This is the highest ever. For comparison, what was the comparable pre-war number

Recent data indicate that 33% of Americans now have 4-year degrees. This is the highest ever. For comparison, what was the comparable pre-war number (1940)?

or:Recent data indicate that 33% of Americans now have 4-year degrees. This is the highest ever. For comparison, what was the comparable pre-war number (1940)?

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