1977, Atlanta, Georgia
1976, Washington, District of Columbia
1975, Clarksburg, West Virginia
1967, Boston, Massachusetts
1967, Bismarck, North Dakota
1964, Norton Shores, Michigan
1964, New York, New York
1963, Washington, District of Columbia
1959, Bismarck, North Dakota
1956, Bismarck, North Dakota
1955, Collegeville, Minnesota
1953, , Minnesota
1951, Grosse Pointe Farms, Michigan
1947, Ligonier, Pennsylvania
1940, New Kensington, Pennsylvania
1938, Pittsburgh, Pennsylvania
1933, Coulee Dam, Washington
1913, Cleveland, Ohio
