Some figures about region:
Fort Smith - NWA (Benton, Washington, Madison, Crawford, Franklin, Sebastian, AR; McDonald, MO; Sequoyah, LeFlore, OK) - 784,000
Springfield - Branson (Greene, Dallas, Polk, Webster, Christian, Stone, Taney, MO) - 527,000
Shreveport - Texarkana (Caddo, Bossier, Webster, LA; Bowie, TX; Miller, AR) - 565,000
Jackson - Vicksburg (Hinds, Warren, Madison, Simpson, Rankin, Copiah, MS) - 594,000
Wichita - Hutchinson (Sedgwick, Harvey, Sumner, Butler, Cowley, Reno, KS) - 725,000
Des Moines - Ames (Polk, Dallas, Warren, Guthrie, Madison, Story, Boone, Jasper, Marion, IA) - 773,000