For the U.S.:
Fishing, hunting, trapping: 3.1 workers on average
Building construction: 5.5
Real estate: 5.9
Funds, trusts, and other financial vehicles: 6
Repair and maintenance: 6.1
Time for some creative disruption, people…
Those figures are from the new and excellent Big is Beautiful: Debunking the Myth of Small Business, by Robert D. Atkinson and Michael Lind.