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"): Dubai International Airport (IATA: DXB, ICAO: OMDB) (Arabic: مطار دبي الدولي‎ ‎ ) is the primary international airport serving Dubai, United Arab Emirates and is the world's busiest airport by international passenger traffic.
Relevant evidence: No