[["", "first quarter", "second quarter", "third quarter", "fourth quarter"], ["2015", "22% ( 22 % )", "25% ( 25 % )", "26% ( 26 % )", "27% ( 27 % )"], ["2014", "22% ( 22 % )", "25% ( 25 % )", "26% ( 26 % )", "27% ( 27 % )"], ["2013", "23% ( 23 % )", "26% ( 26 % )", "26% ( 26 % )", "25% ( 25 % )"]]