About 900 South Carolina payday and auto-title lenders made more than a million such loans in 2015, the latest year tallied by the Durham-based Center for Responsible Lending. The 128,000 borrowers paid an average annual percentage rate of 390% on a $391 loan borrowed for two weeks. The number of loans made to North Carolinians is not tracked, but clearly tens of thousands made the trek across the state line, helping make South Carolina the 12th-biggest payday-lending state. It ranks 24th in population.