Eastern region
CT, DE, DC, ME, MD, MA, NH, NJ, NY, PA, RI, VT
Midwestern region
IL, IN, IA, KS, MI, MN, MO, NE, ND, OH, SD, WI
Southeastern region
AL, FL, GA, KY, MS, NC, SC, TN, VA, WV
Southwestern region
AR, LA, NM, OK, TX
Western/Rocky Mountain region
AK, AZ, CA, CO, HI, ID, MT, NV, OR, WA, WY