U.S. consumers increased their debt in November by a seasonally adjusted $20.4 billion, the largest increase since November 2001, the Federal Reserve reported Monday. Monthly debt rose at a 10% annual rate in November, a much faster pace than had been expected by Wall Street economists. All types of credit gained in the month. The non-revolving category of debt, such as auto loans, personal loans, and student loans, rose $14.8 billion, or 10.7%, in November. Credit card debt jumped by $5.6 billion, or 8.5%, in the month.