In 1800 where did most Americans work?

The five most populous U.S. states according to the 1790 U.S. Census were...

1. Virginia (691,737)
2. Pennsylvania (434,373)
3. North Carolina (393,751)
4. Massachusetts (378,787)
5. New York (340,120)

It's worth noting that in 1790, Virginia included what are now West Virginia and Kentucky, North Carolina included what is now Tennessee, and Massachusetts included what is now Maine.