Americans are becoming more thrifty, according to new data from rating agency Fitch. The share of delinquent accounts is at the lowest level since 1991, with more credit card borrowers paying off their balance in full each month and fewer carrying a balance. The typical credit card charge-off rate peaked at 11.4 percent in early 2010 but began to fall abruptly by 2011. The Federal Reserve recently reported that the total number of credit card accounts fell from nearly 500 million in 2008 to 380 million now. Two area where Americans are not deleveraging are student loans and federal debt. Total student loan balances are nearly $1 trillion, with default rates exceeding any other type of debt. Americans' savings rates also continue to decline.