Fannie Mae will pay the Treasury Department $7.2 billion after posting an eighth straight quarterly profit, pushing total dividend payments above the $116.1 billion of aid it received after the financial crisis, Bloomberg News reported on Friday. The mortgage-finance company, which is operating under federal conservatorship, had net income of $6.5 billion for the three months ended Dec. 31, Washington, D.C.-based Fannie Mae said on Friday in a regulatory filing. That brought earnings for 2013 to $84 billion, the highest ever for the 80-year-old firm.