https://ustr.gov/sites/default/files/files/Press/Reports/2018%20National%20Trade%20Estimate%20Report.pdf
https://static1.squarespace.com/static/603e6df5fbb8861bf7864b6c/t/64773377785ed9253f510651/1685533575306/UKTBC+Trading+our+way+to+prosperity+30_5_23+Digital.pdf
https://www.bloomberg.com/news/articles/2020-04-18/a-wild-ride-for-global-supply-chains-captured-in-seven-charts?cmpid=BBD041820_CORONAVIRUS&utm_medium=email&utm_source=url_link&utm_term=200418&utm_campaign=coronavirus