| 1869 | Chicago, Illinois (founding) | 1951 | Indianapolis, Indiana |
| 1872 | Columbus, Ohio | 1955 | Milford, Indiana |
| 1876 | Cleveland, Ohio | 1959 | Winona Lake, Indiana |
| 1880 | Cleveland, Ohio | 1963 | Saint Louis, Missouri |
| 1884 | Pittsburgh, Pennsylvania | 1967 | Detroit, Michigan |
| 1888 | Indianapolis, Indiana | 1971 | Wichita, Kansas |
| 1892 | Cincinnati, Ohio | 1973 | Junction City, Kansas |
| 1896 | Pittsburgh, Pennsylvania | 1975 | Denver, Colorado |
| 1900 | Chicago, Illinois | 1976 | Portland, Maine |
| 1904 | Indianapolis, Indiana | 1977 | Santa Ana, California |
| 1908 | Columbus, Ohio | 1979 | Birmingham, Alabama |
| 1912 | Atlantic City, New Jersey | 1981 | Coldwater, Michigan |
| 1916 | Saint Paul, Minnesota | 1983 | Mandan, North Dakota |
| 1920 | Lincoln, Nebraska | 1985 | Springfield, Illinois |
| 1924 | Columbus, Ohio | 1987 | Springfield, Illinois |
| 1928 | Chicago, Illinois | 1990 | Reading, Pennsylvania |
| 1932 | Indianapolis, Indiana | 1991 | Minneapolis, Minnesota |
| 1936 | Niagara Falls, New York | 1993 | Fremont, Ohio |
| 1940 | Chicago, Illinois | 1995 | Denver, Colorado |
| 1943 | Indianapolis, Indiana | 1997 | Indianapolis, Indiana |
| 1947 | Winona Lake, Indiana | 1999 | Bird-in-Hand, PA |