2006, Washington, District of Columbia
1995, Denver, Colorado
1984, Denver, Colorado
1983, Battle Creek, Michigan
1982, Fairfax, Virginia
1982, Arlington, Virginia
1981, Las Vegas, Nevada
1977, Atlanta, Georgia
1973, Grapevine, Texas
1973, Dallas, Texas
1972, Washington, District of Columbia
1969, Houston, Texas
1961, Edwardsville, Illinois
1958, Sterling, Virginia
1957, St. Louis, Missouri
1950, University City, Missouri
1926, Providence, Rhode Island
1881, Denver, Colorado
1859, St. Louis, Missouri
1796, Cleveland, Ohio
