Task: Table-QA (source dataset: FinQA)

Task: 
You are given a table containing structured data and a natural language question referring to the table. Your goal is to analyze the table and provide an accurate and concise answer based on the given data.

Instructions:
1. Understand the Table: Examine the structure, headers, and data in the table. Identify relevant columns and rows related to the question.
2. Interpret the Question: Determine whether the question requires direct retrieval, aggregation, comparison, sorting, filtering, or inference.
3. Extract the Answer: Use logical reasoning and numerical operations (if necessary) to derive the correct response from the table.
4. Format the Answer: No explanation, return the answer in a structured JSON format: {"answer": <answer>}. If the question cannot be answered due to missing or ambiguous data, return a JSON response with {"answer": null}.

Table:
| Unnamed: 0                  | 2009   | 2010   | 2011   | 2012   | 2013   | 2014   |
|:----------------------------|:-------|:-------|:-------|:-------|:-------|:-------|
| vornado realty trust        | $ 100  | $ 123  | $ 118  | $ 128  | $ 147  | $ 201  |
| s&p 500 index               | 100    | 115    | 117    | 136    | 180    | 205    |
| the nareit all equity index | 100    | 128    | 139    | 166    | 171    | 218    |

Question:
what was the five year change in the s&p 500 index?


pre_text: performance graph the following graph is a comparison of the five-year cumulative return of our common shares , the standard & poor 2019s 500 index ( the 201cs&p 500 index 201d ) and the national association of real estate investment trusts 2019 ( 201cnareit 201d ) all equity index , a peer group index .
the graph assumes that $ 100 was invested on december 31 , 2009 in our common shares , the s&p 500 index and the nareit all equity index and that all dividends were reinvested without the payment of any commissions .
there can be no assurance that the performance of our shares will continue in line with the same or similar trends depicted in the graph below. .
post_text: .
label: 105
qa: answer: 105
ann_table_rows: 2
steps: op: minus2-1
arg1: 205
arg2: 100
res: 105
program: subtract(205, 100)
gold_inds: table_2: the s&p 500 index of 2009 is 100 ; the s&p 500 index of 2010 is 115 ; the s&p 500 index of 2011 is 117 ; the s&p 500 index of 2012 is 136 ; the s&p 500 index of 2013 is 180 ; the s&p 500 index of 2014 is 205 ;
exe_ans: 105
tfidftopn: text_0: performance graph the following graph is a comparison of the five-year cumulative return of our common shares , the standard & poor 2019s 500 index ( the 201cs&p 500 index 201d ) and the national association of real estate investment trusts 2019 ( 201cnareit 201d ) all equity index , a peer group index .
text_1: the graph assumes that $ 100 was invested on december 31 , 2009 in our common shares , the s&p 500 index and the nareit all equity index and that all dividends were reinvested without the payment of any commissions .
program_re: subtract(205, 100)
model_input: text_1
the graph assumes that $ 100 was invested on december 31 , 2009 in our common shares , the s&p 500 index and the nareit all equity index and that all dividends were reinvested without the payment of any commissions .
table_2
the s&p 500 index of 2009 is 100 ; the s&p 500 index of 2010 is 115 ; the s&p 500 index of 2011 is 117 ; the s&p 500 index of 2012 is 136 ; the s&p 500 index of 2013 is 180 ; the s&p 500 index of 2014 is 205 ;
table_3
the the nareit all equity index of 2009 is 100 ; the the nareit all equity index of 2010 is 128 ; the the nareit all equity index of 2011 is 139 ; the the nareit all equity index of 2012 is 166 ; the the nareit all equity index of 2013 is 171 ; the the nareit all equity index of 2014 is 218 ;