From Guns.com:

Gun ownership spiked worldwide over the last decade, according to the most recent Small Arms Survey.

Civilian-held legal and illegal firearms increased 32 percent to 857 million in 2017, according to researchers. American gun ownership far outpaced the remaining 229 counties and territories included in the list, accounting for more than 45 percent of the global total — or roughly 120.5 firearms per 100 U.S. citizens.