Census data included the name of the head of the family and categorized inhabitants as: free white males at least 16 years of age (to assess the country's industrial and military potential), free white males under 16 years of age, free white females, all other free persons (reported by sex and color), and slaves. Thomas Jefferson, then the Secretary of State, directed marshals to collect data from all 13 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. The census was not conducted in Vermont until 1791, after that state's admission to the Union as the 14th state on March 4 of that year.