1. Wyoming — 19,240
2. Alaska — 21,430
3. Vermont — 24,600
4. North Dakota — 32,530
5. South Dakota — 35,590
6. Delaware — 35,880
7. Montana — 36,520
8. Hawaii — 40,400
9. Idaho — 49,380
10. Rhode Island — 50,640
Source: Kaiser Family Foundation.