According to that data business of any airport can be determined. However rank of every airport changes year by year except the number 1 Hartsfield–Jackson Atlanta International Airport which maintained its position on number One for more than 10 year.
So for 2011 list is as below
1.Hartsfield–Jackson Atlanta International Airport - Atlanta, Georgia, USA
2.Beijing Capital International Airport - Beijing, China
3.Tokyo International Airport – Tokyo, Japan
4.London Heathrow International Airport- London, UK
5.O'Hare International Airport- Chicago, United States