Question: How many passengers did the only other base for Ishtar Airlines, other than Baghdad International Airport, serve in 2016?
Sentence (from "Dubai International Airport"): It is also the 3rd busiest airport in the world by passenger traffic, the 6th busiest cargo airport in world, the busiest airport for Airbus A380 and Boeing 777 movements, and the busiest airport in the world operating with only two runways.
Relevant evidence: No