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                   | 12/31/2007   | 12/31/2008   | 12/31/2009   | 12/31/2010   | 12/31/2011   | 12/31/2012   |
|:-----------------------------|:-------------|:-------------|:-------------|:-------------|:-------------|:-------------|
| ball corporation             | $ 100.00     | $ 93.28      | $ 117.01     | $ 155.14     | $ 164.09     | $ 207.62     |
| dj us containers & packaging | $ 100.00     | $ 61.55      | $ 84.76      | $ 97.78      | $ 96.27      | $ 107.76     |
| s&p 500                      | $ 100.00     | $ 61.51      | $ 75.94      | $ 85.65      | $ 85.65      | $ 97.13      |

Question:
what is the roi of an investment in ball corporation from 2007 to 2012?


pre_text: shareholder return performance the line graph below compares the annual percentage change in ball corporation fffds cumulative total shareholder return on its common stock with the cumulative total return of the dow jones containers & packaging index and the s&p composite 500 stock index for the five-year period ended december 31 , 2012 .
it assumes $ 100 was invested on december 31 , 2007 , and that all dividends were reinvested .
the dow jones containers & packaging index total return has been weighted by market capitalization .
total return to stockholders ( assumes $ 100 investment on 12/31/07 ) total return analysis .
post_text: source : bloomberg l.p .
aecharts .
label: 1.0762
qa: answer: 107.6%
ann_table_rows: 1
steps: op: minus1-1
arg1: 207.62
arg2: const_100
res: 107.62
op: divide1-2
arg1: #0
arg2: const_100
res: 107.6%
program: subtract(207.62, const_100), divide(#0, const_100)
gold_inds: table_1: the ball corporation of 12/31/2007 is $ 100.00 ; the ball corporation of 12/31/2008 is $ 93.28 ; the ball corporation of 12/31/2009 is $ 117.01 ; the ball corporation of 12/31/2010 is $ 155.14 ; the ball corporation of 12/31/2011 is $ 164.09 ; the ball corporation of 12/31/2012 is $ 207.62 ;
exe_ans: 1.0762
tfidftopn: text_3: total return to stockholders ( assumes $ 100 investment on 12/31/07 ) total return analysis .
text_0: shareholder return performance the line graph below compares the annual percentage change in ball corporation fffds cumulative total shareholder return on its common stock with the cumulative total return of the dow jones containers & packaging index and the s&p composite 500 stock index for the five-year period ended december 31 , 2012 .
program_re: divide(subtract(207.62, const_100), const_100)
model_input: text_1
it assumes $ 100 was invested on december 31 , 2007 , and that all dividends were reinvested .
table_1
the ball corporation of 12/31/2007 is $ 100.00 ; the ball corporation of 12/31/2008 is $ 93.28 ; the ball corporation of 12/31/2009 is $ 117.01 ; the ball corporation of 12/31/2010 is $ 155.14 ; the ball corporation of 12/31/2011 is $ 164.09 ; the ball corporation of 12/31/2012 is $ 207.62 ;
table_3
the s&p 500 of 12/31/2007 is $ 100.00 ; the s&p 500 of 12/31/2008 is $ 61.51 ; the s&p 500 of 12/31/2009 is $ 75.94 ; the s&p 500 of 12/31/2010 is $ 85.65 ; the s&p 500 of 12/31/2011 is $ 85.65 ; the s&p 500 of 12/31/2012 is $ 97.13 ;