40.4% of the U.S. workforce is now made up of contingent workers—that is, people who don’t have what we traditionally consider secure jobs....
Agency temps: (1.3%)
On-call workers (people called to work when needed): (3.5%)
Contract company workers (3.0%)
Independent contractors who provide a product or service and find their own customers (12.9%)
Self-employed workers such as shop and restaurant owners, etc. (3.3%)
Standard part-time workers (16.2%).