| Northeast | (NH, VT, ME, MA, RI, CT, NY, PA, NJ) |
| South | (OK, TX, AR, LA, KY, TN, MS, AL, DE, MD, DC, WV, VA, NC, SC, GA, FL) |
| Midwest | (ND, SD, NE, KS, MN, IA, MO, WI, IL, IN, OH, MI) |
| West | (WA, OR, CA, ID, NV, UT, AZ, CO, NM, MT, WY, HI, AK) |
| New England | (NH, VT, ME, MA, RI, CT) |
| Middle Atlantic | (NY, PA, NJ) |
| South Atlantic | (DE, MD, DC, WV, VA, NC, SC, GA, FL) |
| East South Central | (KY, TN, MS, AL) |
| West South Central | (TX, OK, AR, LA) |
| East North Central | (WI, MI, IL, MN, OH) |
| West North Central | (ND, MN, SD, IA, NE, MO, KS) |
| Mountain | (MT, ID, WY, NV, UT, CO, AZ, NM) |
| Pacific | (WA, OR, CA, AK, HI) |