TransUnion: Consumers Take on More Credit Card Debt; Delinquency Rate Ticks up in Q4 CHICAGO, IL--(Marketwire - Feb 20, 2013) - The national credit card delinquency rate (the ratio of borrowers 90 or more days past due) increased to 0.85% in Q4 2012 from 0.78% in Q4 2011. The...