[["", "2017", "2016", "2015"], ["statutory u.s . rate", "35.0% ( 35.0 % )", "35.0% ( 35.0 % )", "35.0% ( 35.0 % )"], ["one time transition tax", "9.1", "-", "-"], ["state income taxes net of federal benefit", "0.4", "0.9", "0.4"], ["foreign operations", "-7.4 ( 7.4 )", "-8.0 ( 8.0 )", "-8.1 ( 8.1 )"], ["domestic manufacturing deduction", "-2.2 ( 2.2 )", "-2.0 ( 2.0 )", "-2.7 ( 2.7 )"], ["r&d credit", "-1.0 ( 1.0 )", "-1.1 ( 1.1 )", "-1.0 ( 1.0 )"], ["change in valuation allowance", "0.2", "-0.7 ( 0