Census
Census , noun
[Latin census, from censere. See Censor.]
1.
(Botany Antiquities) A numbering of the people, and valuation of their estate, for the purpose of imposing taxes, etc.; -- usually made once in five years.
2.
An official registration of the number of the people, the value of their estates, and other general statistics of a country.
A general census of the United States was first taken in 1790, and one has been taken at the end of every ten years since.