Please answer the given financial question based on the context.
Context: stock performance graph the following graph provides a comparison of five year cumulative total stockholder returns of teleflex common stock , the standard & poor 2019s ( s&p ) 500 stock index and the s&p 500 healthcare equipment & supply index . the annual changes for the five-year period shown on the graph are based on the assumption that $ 100 had been invested in teleflex common stock and each index on december 31 , 2010 and that all dividends were reinvested . market performance .
|company / index|2010|2011|2012|2013|2014|2015|
|teleflex incorporated|100|117|138|185|229|266|
|s&p 500 index|100|102|118|157|178|181|
|s&p 500 healthcare equipment & supply index|100|99|116|148|187|199|
s&p 500 healthcare equipment & supply index 100 99 116 148 187 199 .
Question: based on the table , how much percent did the healthcare sector outperform the overall market in this 5 year period?
Answer:
18.0