You're right! It was a mistype. Fixed and thank you. It's about 20X depending on year and methodology. And not just on guns -- all violent crime:
https://www.nationmaster.com/country-info/compare/Denmark/United-States/Crime/Violent-crime
Written by Dan Perry
Journalist and comms professional who led the Associated Press in the Middle East, Africa, Europe & Caribbean. Author of Israel & the Quest for Permanence.