Subprime mortgage lenders appear to be shaking off a sluggish start and are on track to post some respectable volume gains this year. And in the process, they have given a boost to the overall mortgage market, which has seen volume perk up a bit recently. Inside B&C Lending estimates that subprime lenders originated $298.06 billion in new home loans during the first half of the year. That performance marked a healthy 21.1 percent upswing… [Two data tables included]