what was the percentual increase observed in the alcoainc . investment during 2013 and 2014?
Important information:
text_0: stock performance graph the following graph compares the most recent five-year performance of alcoa 2019s common stock with ( 1 ) the standard & poor 2019s 500 ae index and ( 2 ) the standard & poor 2019s 500 ae materials index , a group of 27 companies categorized by standard & poor 2019s as active in the 201cmaterials 201d market sector .
text_1: such information shall not be deemed to be 201cfiled . 201d five-year cumulative total return based upon an initial investment of $ 100 on december 31 , 2010 with dividends reinvested alcoa inc .
table_1: as of december 31 , the alcoainc . of 2010 is $ 100 ; the alcoainc . of 2011 is $ 57 ; the alcoainc . of 2012 is $ 58 ; the alcoainc . of 2013 is $ 72 ; the alcoainc . of 2014 is $ 107 ; the alcoainc . of 2015 is $ 68 ;
Reasoning Steps:
Step: divide1-1(107, 72) = 1.486
Step: minus1-2(#0, const_1) = 48.6%
Program:
divide(107, 72), subtract(#0, const_1)
Program (Nested):
subtract(divide(107, 72), const_1)

Please answer the following financial question based on the context provided. Make sure to give the answer in raw number, not in percentage and without any units. If the question asks for percentage the value should be less than 1
Context:
stock performance graph the following graph compares the most recent five-year performance of alcoa 2019s common stock with ( 1 ) the standard & poor 2019s 500 ae index and ( 2 ) the standard & poor 2019s 500 ae materials index , a group of 27 companies categorized by standard & poor 2019s as active in the 201cmaterials 201d market sector . such information shall not be deemed to be 201cfiled . 201d five-year cumulative total return based upon an initial investment of $ 100 on december 31 , 2010 with dividends reinvested alcoa inc . s&p 500 ae index s&p 500 ae materials index dec-'10 dec-'11 dec-'12 dec-'14 dec-'15dec-'13 .
Table
as of december 31,        | 2010  | 2011 | 2012 | 2013 | 2014  | 2015
alcoainc .                | $ 100 | $ 57 | $ 58 | $ 72 | $ 107 | $ 68
s&p 500 aeindex           | 100   | 102  | 118  | 157  | 178   | 181 
s&p 500 aematerials index | 100   | 90   | 104  | 130  | 139   | 128 
s&p 500 ae index 100 102 118 157 178 181 s&p 500 ae materials index 100 90 104 130 139 128 copyright a9 2016 standard & poor 2019s , a division of the mcgraw-hill companies inc . all rights reserved . source : research data group , inc . ( www.researchdatagroup.com/s&p.htm ) .
Question: 
what was the percentual increase observed in the alcoainc . investment during 2013 and 2014?
Important information:
text_0: stock performance graph the following graph compares the most recent five-year performance of alcoa 2019s common stock with ( 1 ) the standard & poor 2019s 500 ae index and ( 2 ) the standard & poor 2019s 500 ae materials index , a group of 27 companies categorized by standard & poor 2019s as active in the 201cmaterials 201d market sector .
text_1: such information shall not be deemed to be 201cfiled . 201d five-year cumulative total return based upon an initial investment of $ 100 on december 31 , 2010 with dividends reinvested alcoa inc .
table_1: as of december 31 , the alcoainc . of 2010 is $ 100 ; the alcoainc . of 2011 is $ 57 ; the alcoainc . of 2012 is $ 58 ; the alcoainc . of 2013 is $ 72 ; the alcoainc . of 2014 is $ 107 ; the alcoainc . of 2015 is $ 68 ;
Reasoning Steps:
Step: divide1-1(107, 72) = 1.486
Step: minus1-2(#0, const_1) = 48.6%
Program:
divide(107, 72), subtract(#0, const_1)
Program (Nested):
subtract(divide(107, 72), const_1)
