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 32236 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 26039 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 . our operating revenues are primarily derived from contracts with customers for the transportation of freight from origin to destination . effective january 1 , 2018 , the company reclassified its six commodity groups into four : agricultural products , energy , industrial , and premium . the following table represents a disaggregation of our freight and other revenues: .

Table:
millions | 2018 | 2017 | 2016
agricultural products | $ 4469 | $ 4303 | $ 4209
energy | 4608 | 4498 | 3715
industrial | 5679 | 5204 | 4964
premium | 6628 | 5832 | 5713
total freight revenues | $ 21384 | $ 19837 | $ 18601
other subsidiary revenues | 881 | 885 | 814
accessorial revenues | 502 | 458 | 455
other | 65 | 60 | 71
total operating revenues | $ 22832 | $ 21240 | $ 19941
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 $ 2.5 billion in 2018 , $ 2.3 billion in 2017 , and $ 2.2 billion in 2016 .
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 , cash equivalents and restricted cash 2013 cash equivalents consist of investments with original maturities of three months or less .
amounts included in restricted cash represent those required to be set aside by contractual agreement. .

Question: in billions , what would 2018 total operating revenues have been without the mexico business?
Answer: 20.332
Calculation: divide(22832, const_1000), subtract(#0, 2.5)