The American credit card market continued its expansion in the third quarter of 2015 as purchase volumes rose across all risk categories, according to the American Bankers Association’s latest Credit Card Market Monitor.

On a year-over-year basis, purchase volumes rose 6.1 percent for subprime accounts, 4.2 percent for prime accounts and 3.5 percent for super-prime accounts, the ABA said. Moreover, the number of new credit card accounts rose 16.5 percent year-over-year to total 78.9 million nationwide.

The ABA generally hailed this as a good thing, as a reflection of economic growth more generally.

“Recent growth in the credit card market is consistent with what we’re seeing in the broader economy,” Jess Sharp, executive director of ABA’s Card Policy Council, said in a statement. “With nearly 6 million jobs created over the last two years, it’s natural to see strong growth in new cards and purchase volumes. Faster wage growth and healthy levels of disposable income have helped shore up many account holders who may have had difficulty managing their credit in the past. Consumers are now in a better position to pay on time and rebuild their credit.”

According to the ABA’s report, that hike in new credit card accounts also included a 30 percent year-over-year increase in subprime accounts, but the organization also said the subprime segment remained one-third below levels seen in the first quarter of 2008. The number of open credit card accounts also increased to 320 million (up 5 percent from a year prior), driven by moderate gains across all three risk groups, the ABA said.

Credit card credit outstanding as a share of disposable income also increased slightly to 5.38 percent in the third quarter, while the effective finance charge yield, a measure of credit card interest payments, was essentially flat. Both metrics remain near post-recession lows.

Revolver accounts, the name given to account holders who carry a monthly balance, increased 0.7 percent to 41.7 percent of all accounts. The ABA also said this was near post-recession lows. Transactors, or those who pay their balance in full each month, fell 0.1 percent to 29.4 percent of all accounts.