Definition regions for bar plots
| Region | State/divisions |
|---|---|
| PNW | Washington, Oregon, Idaho, Montana(1,2), Wyoming(1,2) |
| Frontrange | Colorado( 1,3,4), Nebraska(1), Wyoming(1) |
| Highplains | N Dakota, S Dakota, Minnesota, Montana (3,4,5,6,7) |
| SE | Tennessee (1,2,3,4), N Carolina(8), S Carolina(7), Georgia, Alabama, Florida(1,2,3) |
| Western Washington | Washington (1-5) |
| TX/OK | Texas, Oklahoma(9), New Mexico(3,7) |
| Gulfcoast | Texas(7,8,9,10), Louiasiana(6,7,8,9), Mississippi(7,8,10), Florida(1,2,3) |
See MAP for division information.
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