Chain-Type Quantity Index for Real GDP: Air Transportation (NAICS 481) in Maryland was 73.84700 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 Maryland reached a record high of 150.11200 in January of 2018 and a record low of 50.01800 in January of 2002. 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 Maryland - last updated from the United States Federal Reserve on April of 2024.