2007 – Philadelphia, PA (36th), June 7-9
2006 – Saint Louis, MO (35th), June 1-4
2005 – Milwaukee, WI (34th), June 2-June5
2004 – Providence & Blackstone Valley (33rd), June 10-June 13
2003 – Montreal, Quebec, Canada (32nd), May 30-June 1
2002 – Brooklyn, NY (31st), June 6-10
2001 – Washington, DE (30th), May 10-14
2000 – Duluth, MN (29th), June 1-4
1999 – Savannah, GA (28th), June 3-6
1998 – Indianapolis, IN (27th), June 4-7
1997 – Houghton, MI (26th), May 29-June 1
1996 – Sacramento, CA (25th), May 30-June 2
1995 – Baltimore, MD (24th), May 11-14
1994 – Toronto, Ontario, Canada (23rd), June 2-5
1993 – Pittsburgh, PA (22nd), June 3-7
1992 – Buffalo, NY (21st), June 4-7
1991 – Chicago, IL (2oth), June 13-17
1990 – Philadelphia, PA (19th), May 30-June 3
1989 – Quebec, City, Quebec, Canada (18th), June 1-4
1988 – Wheeling, WV (17th), May 19-22
1987 – Troy, NY (16th), May 28-31
1986 – Cleveland, OH (15th), June 12-15
1985 – Newark, NJ (14th), May 9-12
1984 – Boston, MA (13th), June 14-17
1983 – Minneapolis & St. Paul, MN (12th), May 12-15
1982 – Harrisburg, PA (11th), May 6-9
1981 – Hartford, CT (10th), May 7-10
1980 – Detroit, MI (9th), May 29-June 1
1979 – Columbus, GA (8th), April 26-29
1978 – Louisville, KY & Cincinnati, OH (7th), March 30-April 2
1977 – Wilmington, DE (6th), 28-May 1
1976 – Lowell, MA (5th), April 23-26
1975 – Baltimore, MD (4th), April 25-28
1974 – Pittsburgh, PA (3rd), April 26-29
1973 – Troy, NY (2nd), April 28-29
1972 – New York, NY (1st), April 8-9
1971 – Washington, DC Founding Meeting, October 16