| Western Canada | Alberta, British Columbia, Manitoba, Saskatchewan |
| Eastern Canada | New Brunswick, Ontario, Québec |
| Northwestern U.S.A. | Colorado, Idaho, Montana, Oregon, Washington, Wyoming |
| North-Central U.S.A. | Minnesota, North Dakota, South Dakota, Wisconsin |
| Northeastern U.S.A. | Michigan, New York |
| Southwestern U.S.A. | Arizona, California, Nevada, Utah |
| South-Central U.S.A. | New Mexico, Texas |
| Mexico | Mexico Central, Mexico Northeast, Mexico Gulf, Mexico Southwest |