| 2002, 2007 Florida Kansas Michigan Northeastern Rocky Mountain Texas |
2003, 2008 Illinois Kentucky Missouri Northern California Seaway Wisconsin |
2004, 2009 Indiana Louisiana-Mississippi Nebraska Ohio Southeastern |
2005, 2010 Allegheny Mountain Intermountain MD-DC-VA New Jersey Oklahoma-Arkansas Southern California |
2006, 2011 EPADEL Iowa Metro New York North Central Pacific Northwest Southwestern |