http://blogs.lse.ac.uk/brexit/2017/10/24/the-eu-isnt-protectionist-its-one-of-the-most-open-economies-in-the-world/
https://www.eia.gov/energyexplained/us-energy-facts/imports-and-exports.php
https://www.southcentre.int/wp-content/uploads/2022/09/RP143_Brazilian-Competition-Law-and-Access-to-Health-in-Brazil_EN.pdf