The attendance was close for several years, but in recent years
the Indy 500 has begun to pull away from the Allstate 400 in
attendance figures. The Indy 500 continues to be close to a sellout
crowd each year, while the Allstate 400 has begun to show sizeable
gaps. There will never be fully accurate numbers though, as the
Indianapolis Motor Speedway refuses to publize their attendance
numbers.