http://www.bankofengland.co.uk/publications/Documents/speeches/2017/speech968.pdf
https://www.eia.gov/energyexplained/us-energy-facts/imports-and-exports.php
https://www.brookings.edu/articles/april-2024-update-to-tiger-a-feeble-recovery-characterized-by-multiple-divergences/
https://www.gsb.stanford.edu/gsb-box/route-download/621098