1790 United States census
Census data included the name of the head of the family. They put people into these categories: free white males at least 16 years old (to figure out the country's industrial and military potential), free white males under 16 years old, free white females, all other free persons (reported by sex and color), and slaves. The Secretary of State Thomas Jefferson told marshals to get data from all thirteen states (Connecticut, Delaware, Georgia, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, and Virginia), and from the Southwest Territory.