.s . dollars except for percentages )", "2010 market value", "2010 percentage of total", "2010 market value", "percentageof total"], ["treasury", "$ 2075", "4% ( 4 % )", "$ 2068", "5% ( 5 % )"], ["agency", "2015", "4% ( 4 % )", "2698", "6% ( 6 % )"], ["corporate and asset-backed securities", "15900", "33% ( 33 % )", "13537", "30% ( 30 % )"], ["mortgage-backed securities", "12362", "25% ( 25 % )", "11311", "25% ( 25 % )"], ["municipal", "2449", "5% ( 5 % )", "2300", "5% ( 5 % )"], ["non-u.s