Chicago, IL-Based TransUnion 4Q 2017 Revenues Up 16% From the 4Q 2016, Pretax Income Up 43% and 4Q 2017 After-Tax Net Income Up a Staggering 368%, With the Latter Aided By an Income Tax Benefit in the 4Q 2017 of $174 Mil Resulting From the Puzzling, Very Lucrative US Federal Income Tax Debt Forgiveness Feature in the US Trump Tax Cuts Act, Which Also Funded the Repatriation Toll Tax Imposed on TransUnion By the US Trump Tax Cuts Act To Boot