FREDERICK, Md. -

National Auto Auction Association members responding to the trade group’s annual survey reported $90.6 billion in sales in 2015, an increase of nearly 11 percent over the prior year. The number of units sold, 9.2 million, was an increase of 6.5 percent, while the number of vehicles entering auction rose by 5.7 percent, coming in at 16.6 million.

The average sale price per vehicle was $9,748, up slightly from the previous year.

NAAA chief executive officer Frank Hackett said the news was encouraging.

“The survey results show the strength and depth of a mature industry that has demonstrated its resiliency. I am confident we'll continue to be a vital and growing part of our nation's economy for years to come," he said.

Dealer consignment vehicles represented the largest number of units sold, with a  57.1-percent share. Next up was finance and fleet (lease, fleet, repo) at 35.1 percent, followed by manufacturer vehicles at 6.9 percent. NAAA said 0.9 percent came from other sources.

The 19th annual survey, conducted for the NAAA by CliftonLarsonAllen, LLP of Arlington, Va., had 76-percent response rate representing 255 NAAA North American member auctions.

The average NAAA auction member operates an eight-lane facility on 78 acres, employs 137 people with a payroll of $3.8 million, and contributes $17,000 annually to charity.