The general aviation industry spent 2021 rebounding from pandemic-related setbacks as demand for aircraft inventory overwhelmed manufacturers and brokers alike.The General Aviation Manufacturers Association (GAMA) released its fourth-quarter general aviation shipment and billings report, highlighting increases in shipments and preliminary aircraft deliveries valued at $25.2 billion, an increase of 10.2% when compared to 2020.Year-over-year, airplane shipments in 2021 were valued at $21.6 billion, an increase of approximately 7.6%.RELATED: Bizjet demand continues to see growth in GAMA Q3 aircraft shipments report"The strength and tenacity of the general aviation industry has provided a strong foundation for the industry to rebound from pandemic-related setbacks with a powerful showing in 2021," said Pete Bunce, GAMA President and CEO. "Total aircraft shipments are converging on figures that were seen before the outset of the pandemic."Piston aircraft shipments through 2021 were up 5.5%, increasing by 72 units when compared to the year prior. Turboprop aircraft deliveries increase the most of any type by 19% with 527 units, with business jets following suit increasing 10.2% with 710 units.Turbine helicopter deliveries over the year saw an increase of 24.8% with 645 units, and piston helicopters an increase of 27.5% with 181 units.The North American market accounted for the highest amount of overall aircraft shipments in the piston engine, turboprop, and business jet categories. For piston engine aircraft, North America accounted for 68.7% of overall shipments, while it accounted for 52.6% of the turboprop aircraft shipments, and 65.9% of all business jet deliveries.