{"pre_text": ["at december 31 , 2015 and 2014 , we had a modest working capital surplus .", "this reflects a strong cash position that provides enhanced liquidity in an uncertain economic environment .", "in addition , we believe we have adequate access to capital markets to meet any foreseeable cash requirements , and we have sufficient financial capacity to satisfy our current liabilities .", "cash flows ."], "post_text": ["operating activities cash provided by operating activities decreased in 2015 compared to 2014 due to lower net income and changes in working capital , partially offset by the timing of tax payments .", "federal tax law provided for 100% ( 100 % ) bonus depreciation for qualified investments made during 2011 and 50% ( 50 % ) bonus depreciation for qualified investments made during 2012-2013 .", "as a result , the company deferred a substantial portion of its 2011-2013 income tax expense , contributing to the positive operating cash flow in those years .", "congress extended 50% ( 50 % ) bonus depreciation for 2014 , but this extension occurred in december , and the related benefit was realized in 2015 , rather than 2014 .", "similarly , in december of 2015 , congress extended bonus depreciation through 2019 , which delayed the benefit of 2015 bonus depreciation into 2016 .", "bonus depreciation will be at a rate of 50% ( 50 % ) for 2015 , 2016 and 2017 , 40% ( 40 % ) for 2018 and 30% ( 30 % ) for 2019 .", "higher net income in 2014 increased cash provided by operating activities compared to 2013 , despite higher income tax payments .", "2014 income tax payments were higher than 2013 primarily due to higher income , but also because we paid taxes previously deferred by bonus depreciation .", "investing activities higher capital investments in locomotives and freight cars , including $ 327 million in early lease buyouts , which we exercised due to favorable economic terms and market conditions , drove the increase in cash used in investing activities in 2015 compared to 2014 .", "higher capital investments , including the early buyout of the long-term operating lease of our headquarters building for approximately $ 261 million , drove the increase in cash used in investing activities in 2014 compared to 2013 .", "significant investments also were made for new locomotives , freight cars and containers , and capacity and commercial facility projects .", "capital investments in 2014 also included $ 99 million for the early buyout of locomotives and freight cars under long-term operating leases , which we exercised due to favorable economic terms and market conditions. ."], "table": [["millions", "2015", "2014", "2013"], ["cash provided by operating activities", "$ 7344", "$ 7385", "$ 6823"], ["cash used in investing activities", "-4476 ( 4476 )", "-4249 ( 4249 )", "-3405 ( 3405 )"], ["cash used in financing activities", "-3063 ( 3063 )", "-2982 ( 2982 )", "-3049 ( 3049 )"], ["net change in cash and cash equivalents", "$ -195 ( 195 )", "$ 154", "$ 369"]], "table_ori": [["Millions", "2015", "2014", "2013"], ["Cash provided by operating activities", "$7,344", "$7,385", "$6,823"], ["Cash used in investing activities", "(4,476)", "(4,249)", "(3,405)"], ["Cash used in financing activities", "(3,063)", "(2,982)", "(3,049)"], ["Net change in cash and cash equivalents", "$(195)", "$154", "$369"]]}

Question: what was the percentage change in cash provided by operating activities from 2013 to 2014?
Evidence:
table_1: millions the cash provided by operating activities of 2015 is $ 7344 ; the cash provided by operating activities of 2014 is $ 7385 ; the cash provided by operating activities of 2013 is $ 6823 ;
Program: subtract(7385, 6823), divide(#0, 6823)
Answer:
str_answer: 8%
exe_answer: 0.08237