Fannie Mae — the much-hated, government-backed entity that needed a massive bailout and gets accused of inflating the housing bubble -- just reported its biggest annual profit in history.From the announcement that came out this morning:Fannie Mae (FNMA/OTC) today reported annual net income of $17.2 billion for 2012 and quarterly net income of $7.6 billion for the fourth quarter of 2012, compared with a net loss of $16.9 billion for 2011. The improvement in the company’s full-year and quarterly net income was due primarily to improved credit results driven by a decline in serious delinquency rates, an increase in home...