Western United States, Northwestern United States, California, Canada
Northeastern United States, Southeastern United States, North-Central United States, Central United States, South-Central United States, Canada
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20