https://www.destatis.de/Europa/EN/Topic/Economy-Finance/Debt.html
https://www.boeckler.de/fpdf/HBS-008396/p_imk_pb_132_2022.pdf
https://www.brookings.edu/blog/up-front/2023/01/25/how-worried-should-we-be-if-the-debt-ceiling-isnt-lifted/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=243260050&utm_source=hs_email
https://www.fraserinstitute.org/sites/default/files/economic-freedom-of-the-world-2021.pdf