Special Olympics throughout the years: A brief table of past World Summer Special Olympics sessions, including session number, hosting time, hosting location, number of delegations, and number of athletes. 1st session: 1968, Chicago (USA), 2 delegations, 1000 athletes; 2nd session: 1970, Chicago (USA), 3 delegations, 2000 athletes; 3rd session: 1972, Los Angeles (USA), 2500 athletes; 4th session: 1975, Michigan (...).