The euro zone and the US are neck and neck actually overall [0, 1] and if you measure it relative their gdp which you should, the eurozone is actually at 61% of gdp whereas the US is at 35% [2]. Japan is the real money printer though at a whopping 130% of gdp!

[0]: https://fred.stlouisfed.org/series/ECBASSETSW

[1]: https://www.federalreserve.gov/monetarypolicy/bst_recenttren...

[2]: https://blocnotesdeleco.banque-france.fr/en/blog-entry/under...

Getting weaker more slowly*