Delhi’s Indira Gandhi International Airport (IGIA) has been adjudged the world’s best airport in the 25-40 million passengers per annum category in the Airport Service Quality (ASQ) awards given by the Airports Council International (ACI) for the year 2014. The airport improved from an ASQ score (measured on scale of 1 to 5) of 3.02 in 2007 to 4.90 in 2014. It was ranked second in 2011, 2012 and 2013.