Question: How many passengers did the only other base for Ishtar Airlines, other than Baghdad International Airport, serve in 2016?
Sentence (from "Ishtar Airlines"): Ishtar Airlines (Arabic: عشتار ايرلاينز‎ ‎ ) was an airline based in Dubai, United Arab Emirates, although it was a private Iraqi airline operating scheduled passenger services, its main bases were its only destinations, Baghdad International Airport and Dubai International Airport.
Relevant evidence: Yes