https://data.oecd.org/natincome/net-lending-borrowing-by-sector.htm
https://blogs.imf.org/2019/12/17/new-data-on-world-debt-a-dive-into-country-numbers/?utm_medium=email&utm_source=govdelivery
https://ec.europa.eu/info/system/files/efb_assessment_of_euro_area_fiscal_stance.pdf