According to the Constitution, every ten years in the United States a census is taken.
<u>Explanation:</u>
Constitution of US directs the responsible authorities to conduct a census every ten years. The Section 2 of Article I of the Constitution authorises the Bureau of the Census to conduct census.
This process of conducting census to determine the exact number of people living in the United States first began in 1790 under the presidentship of George Washington.
