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:
| millions                 | 2015    | 2014    | 2013    |
|:-------------------------|:--------|:--------|:--------|
| agricultural products    | $ 3581  | $ 3777  | $ 3276  |
| automotive               | 2154    | 2103    | 2077    |
| chemicals                | 3543    | 3664    | 3501    |
| coal                     | 3237    | 4127    | 3978    |
| industrial products      | 3808    | 4400    | 3822    |
| intermodal               | 4074    | 4489    | 4030    |
| total freight revenues   | $ 20397 | $ 22560 | $ 20684 |
| other revenues           | 1416    | 1428    | 1279    |
| total operating revenues | $ 21813 | $ 23988 | $ 21963 |

Question:
what percentage of total freight revenues was the intermodal commodity group in 2015?


pre_text: notes to the consolidated financial statements union pacific corporation and subsidiary companies for purposes of this report , unless the context otherwise requires , all references herein to the 201ccorporation 201d , 201ccompany 201d , 201cupc 201d , 201cwe 201d , 201cus 201d , and 201cour 201d mean union pacific corporation and its subsidiaries , including union pacific railroad company , which will be separately referred to herein as 201cuprr 201d or the 201crailroad 201d .
1 .
nature of operations operations and segmentation 2013 we are a class i railroad operating in the u.s .
our network includes 32084 route miles , linking pacific coast and gulf coast ports with the midwest and eastern u.s .
gateways and providing several corridors to key mexican gateways .
we own 26064 miles and operate on the remainder pursuant to trackage rights or leases .
we serve the western two-thirds of the country and maintain coordinated schedules with other rail carriers for the handling of freight to and from the atlantic coast , the pacific coast , the southeast , the southwest , canada , and mexico .
export and import traffic is moved through gulf coast and pacific coast ports and across the mexican and canadian borders .
the railroad , along with its subsidiaries and rail affiliates , is our one reportable operating segment .
although we provide and analyze revenue by commodity group , we treat the financial results of the railroad as one segment due to the integrated nature of our rail network .
the following table provides freight revenue by commodity group: .
post_text: although our revenues are principally derived from customers domiciled in the u.s. , the ultimate points of origination or destination for some products transported by us are outside the u.s .
each of our commodity groups includes revenue from shipments to and from mexico .
included in the above table are freight revenues from our mexico business which amounted to $ 2.2 billion in 2015 , $ 2.3 billion in 2014 , and $ 2.1 billion in 2013 .
basis of presentation 2013 the consolidated financial statements are presented in accordance with accounting principles generally accepted in the u.s .
( gaap ) as codified in the financial accounting standards board ( fasb ) accounting standards codification ( asc ) .
certain prior period amounts in the statement of cash flows and income tax footnote have been aggregated or disaggregated further to conform to the current period financial presentation .
2 .
significant accounting policies principles of consolidation 2013 the consolidated financial statements include the accounts of union pacific corporation and all of its subsidiaries .
investments in affiliated companies ( 20% ( 20 % ) to 50% ( 50 % ) owned ) are accounted for using the equity method of accounting .
all intercompany transactions are eliminated .
we currently have no less than majority-owned investments that require consolidation under variable interest entity requirements .
cash and cash equivalents 2013 cash equivalents consist of investments with original maturities of three months or less .
accounts receivable 2013 accounts receivable includes receivables reduced by an allowance for doubtful accounts .
the allowance is based upon historical losses , credit worthiness of customers , and current .
label: 0.19974000000000003
qa: answer: 20%
ann_table_rows: 6
7
steps: op: divide2-1
arg1: 4074
arg2: 20397
res: 20%
program: divide(4074, 20397)
gold_inds: table_6: millions the intermodal of 2015 is 4074 ; the intermodal of 2014 is 4489 ; the intermodal of 2013 is 4030 ;
table_7: millions the total freight revenues of 2015 is $ 20397 ; the total freight revenues of 2014 is $ 22560 ; the total freight revenues of 2013 is $ 20684 ;
exe_ans: 0.19974000000000003
tfidftopn: table_9: millions The total operating revenues of 2015 is $ 21813 ; The total operating revenues of 2014 is $ 23988 ; The total operating revenues of 2013 is $ 21963 ;
program_re: divide(4074, 20397)
model_input: table_6
millions the intermodal of 2015 is 4074 ; the intermodal of 2014 is 4489 ; the intermodal of 2013 is 4030 ;
table_7
millions the total freight revenues of 2015 is $ 20397 ; the total freight revenues of 2014 is $ 22560 ; the total freight revenues of 2013 is $ 20684 ;
table_9
millions the total operating revenues of 2015 is $ 21813 ; the total operating revenues of 2014 is $ 23988 ; the total operating revenues of 2013 is $ 21963 ;