.", "12199", "25% ( 25 % )", "11172", "25% ( 25 % )"], ["short-term investments", "1983", "4% ( 4 % )", "1667", "4% ( 4 % )"], ["total", "$ 48983", "100% ( 100 % )", "$ 44753", "100% ( 100 % )"], ["aaa", "$ 23718", "48% ( 48 % )", "$ 22884", "51% ( 51 % )"], ["aa", "4714", "10% ( 10 % )", "4021", "9% ( 9 % )"], ["a", "8482", "17% ( 17 % )", "7461", "17% ( 17 % )"], ["bbb", "5487", "11% ( 11 % )", "4910", "11% ( 11 % )"], ["bb", "3357", "7% ( 7 % )", "2866", "6% ( 6 % )"], ["b", "2393", "5% ( 5 % )", "2029",