WASHINGTON, D.C. — New figures released by the General Aviation Manufacturers Association (GAMA) show that total worldwide general aviation airplane shipments rose 4.3%, from 2,164 in 2012 to 2,256 in 2013.

Billings increased to $23.4 billion, up 24% from 2012, when they totaled $18.9 billion. Billings in 2013 were the second-largest number recorded after 2008, when billings were $24.8 billion, according to GAMA officials.

Turboprops rose from 584 sold in 2012 to 645 in 2013, a 10.4% increase. Piston-engine airplanes increased to 933  for the year, an increase of 2.7% from the 908 sold in 2012.

Business jet shipments were also in positive territory, up 0.9% over 2012, from 672  to 678.

Finally, GAMA captures several helicopter manufacturers as part of the year-end report. Shipment results point to an increase of 2.1% in piston helicopter deliveries in 2013 to 335 while the turbine helicopter segment also indicates positive results compared to the prior year.

"The industry’s positive numbers across all categories fuel cautious optimism as we move into 2014,"GAMA President and CEO Pete Bunce said. "The introduction of new products will be key to strong future growth, which is why GAMA continues to work with authorities across the globe to streamline certification processes. It is also why GAMA pushed so hard for adoption of the Part 23/CS-23 Aviation Rulemaking Committee recommendation and then followed by spurring the Small Airplane Revitalization Act, one of the few bills to be passed by the U.S. Congress and signed into law by President Obama last year. We hope 2014 brings an even stronger commitment by policymakers and aviation authorities to make it easier for general aviation manufacturers to introduce new, safety-enhancing products to market and allow our industry to continue to grow."