what was the change in the dow jones technology index between 2016 and 2017?
apple inc . | 2017 form 10-k | 20 company stock performance the following graph shows a comparison of cumulative total shareholder return , calculated on a dividend reinvested basis , for the company , the s&p 500 index , the s&p information technology index and the dow jones u.s . technology supersector index for the five years ended september 30 , 2017 . the graph assumes $ 100 was invested in each of the company 2019s common stock , the s&p 500 index , the s&p information technology index and the dow jones u.s . technology supersector index as of the market close on september 28 , 2012 . note that historic stock price performance is not necessarily indicative of future stock price performance . * $ 100 invested on 9/28/12 in stock or index , including reinvestment of dividends . data points are the last day of each fiscal year for the company 2019s common stock and september 30th for indexes . copyright a9 2017 s&p , a division of mcgraw hill financial . all rights reserved . copyright a9 2017 dow jones & co . all rights reserved . september september september september september september .

|  | September2012 | September2013 | September2014 | September2015 | September2016 | September2017 |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| Apple Inc. | $100 | $74 | $111 | $128 | $129 | $179 |
| S&P 500 Index | $100 | $119 | $143 | $142 | $164 | $194 |
| S&P Information Technology Index | $100 | $107 | $138 | $141 | $173 | $223 |
| Dow Jones U.S. Technology Supersector Index | $100 | $105 | $137 | $137 | $167 | $214 |

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answer = 214 - 167