Key to the 1810 census:

Each digit of the 5 digit number represents an age group.

Free white males:	Free white females:
First digit = under 10 Second digit = 10 and under 16 Third digit = 16 and under 26 Fourth digit = 26 and under 45 Fifth digit = 45 and up	First digit = under 10 Second digit = 10 and under 16 Third digit = 16 and under 26 Fourth digit = 26 and under 45 Fifth digit = 45 and up

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