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 32070 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 26053 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: .

millions
2016
2015
2014
agricultural products
$ 3625
$ 3581
$ 3777
automotive
2000
2154
2103
chemicals
3474
3543
3664
coal
2440
3237
4127
industrial products
3348
3808
4400
intermodal
3714
4074
4489
total freight revenues
$ 18601
$ 20397
$ 22560
other revenues
1340
1416
1428
total operating revenues
$ 19941
$ 21813
$ 23988

although our revenues are principally derived from customers domiciled in the u.s. , the ultimate points of origination or destination for some products we transport 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 2016 , $ 2.2 billion in 2015 , and $ 2.3 billion in 2014 .
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 ) .
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 economic conditions .
receivables not expected to be collected in one year and the associated allowances are classified as other assets in our consolidated statements of financial position. .

Question: what is the mathematical range for chemical revenue from 2014-2016 , in millions?
Answer: 190
Calculation: subtract(3664, 3474)