Chain-Type Quantity Index for Real GDP: Air Transportation (NAICS 481) in the District of Columbia was 30.39300 Index 2009=100 in January of 2020, according to the United States Federal Reserve. Historically, Chain-Type Quantity Index for Real GDP: Air Transportation (NAICS 481) in the District of Columbia reached a record high of 258.60100 in January of 1998 and a record low of 30.39300 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Chain-Type Quantity Index for Real GDP: Air Transportation (NAICS 481) in the District of Columbia - last updated from the United States Federal Reserve on April of 2024.