1952?
1957WATERLOO, IA
1978OMAHA, NE
1979ROCK ISLAND
1980SIOUX CITY
1981OMAHA
1982DES MOINES
1983ST. PAUL
1984DULUTH
1985EAST MOLINE
1986MINNEAPOLIS
1987SIOUX CITY
1988ROCK ISLAND
1989ROCHESTER
1990DES MOINES
1991DULUTH
1992MINNEAPOLIS
1993ST. PAUL
1994MILWAUKEE
1995SIOUX CITY
1996OMAHA
1997EAST MOLINE
1998ROCHESTER
1999CEDAR RAPIDS
2000SIOUX CITY
2001DES MOINES
2002ST. PAUL
2003MILWAUKEE
2004MINNEAPOLIS
2005OMAHA
2006SIOUX CITY
2007WAUKEGAN, IL
2008EAST MOLINE, IL
2009 MILWAUKEE, WI
2010 OVERLAND PARK, KS
2011 ROCK ISLAND, IL??
2012 ST. PAUL, MN??
2013 MILWAUKEE, WI??
2014 MINNEAPOLIS, MN??
2015 OMAHA, NE??
2016 SIOUX CITY, IA??