{"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 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: ."], "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 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. ."], "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"]], "table_ori": [["Millions", "2018", "2017", "2016"], ["Agricultural Products", "$4,469", "$4,303", "$4,209"], ["Energy", "4,608", "4,498", "3,715"], ["Industrial", "5,679", "5,204", "4,964"], ["Premium", "6,628", "5,832", "5,713"], ["Total freight revenues", "$21,384", "$19,837", "$18,601"], ["Other subsidiary revenues", "881", "885", "814"], ["Accessorial revenues", "502", "458", "455"], ["Other", "65", "60", "71"], ["Total operating revenues", "$22,832", "$21,240", "$19,941"]]}

Question: in billions , what would 2018 total operating revenues have been without the mexico business?
Evidence:
table_9: millions the total operating revenues of 2018 is $ 22832 ; the total operating revenues of 2017 is $ 21240 ; the total operating revenues of 2016 is $ 19941 ;
text_15: 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 .
Program: divide(22832, const_1000), subtract(#0, 2.5)
Answer:
str_answer: 20.332
exe_answer: 20.332