Poor economic conditions are driving up consumers' credit card balances and delinquency rates, according to data released Wednesday by TransUnion LLC.

The Chicago credit bureau found that the average credit card holder's debt in the third quarter was $5,710, up 6% from the year earlier. About 1.09% of cardholders were delinquent on one or more accounts in the quarter, up from 1.03% a year before.

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