what is the 6 year return of the dow jones u.s . technology supersector index?
apple inc . | 2016 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 24 , 2016 . 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 23 , 2011 . note that historic stock price performance is not necessarily indicative of future stock price performance . * $ 100 invested on 9/23/11 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 2016 s&p , a division of mcgraw hill financial . all rights reserved . copyright a9 2016 dow jones & co . all rights reserved . september september september september september september .

|  | September2011 | September2012 | September2013 | September2014 | September2015 | September2016 |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| Apple Inc. | $100 | $166 | $123 | $183 | $212 | $213 |
| S&P 500 Index | $100 | $130 | $155 | $186 | $185 | $213 |
| S&P Information Technology Index | $100 | $132 | $142 | $183 | $187 | $230 |
| Dow Jones U.S. Technology Supersector Index | $100 | $130 | $137 | $178 | $177 | $217 |

.

index_value = 217
initial_investment = 100
answer = (index_value - initial_investment) / initial_investment * 100