| 1 |
Alaska, Canada(West, Central), Colorado, Idaho
Montana, Oregon, Utah, Washington, Wyoming |
| 2 |
Arizonia, California, Hawaii, Nevada |
| 3 |
Illinois, Iowa, Kansas, Minnesota, Missouri, Nebraska
North Dakota, South Dakota, Wisconsin |
| 4 |
Canada(East), Connecticut, District of Columbia
Delaware, Indiana, Kentucky, Maine, Maryland
Michigan, New Hampshire, New Jersey, New York
Ohio, Pennsylvania, Rhode Island, Vermont
Virginia, West Virginia |
| 5 |
Alabama, Florida, Georgia, North Carolina
South Carolina, Tennessee |
| 6 |
Arkansas, Louisiana, Mississippi, Texas(East) |
| 7 |
West Texas, South Texas, New Mexico |
| 8 |
Oklahoma, Texas(North) |