| Region | Estimate PCI | Year | Actual PCI |
| Oklahoma | $18,677 | 1995 | $19,144 |
| Central | $20,728 | 1996 | $21,113 |
| Northeast | $13,874 | 1986 | $13,965 |
| Northwest | $30,441 | 2006 | $31,337 |
| Southeast | $17,270 | 1998 | $17,691 |
| Southwest | $20,391 | 2000 | $21,351 |