Story highlights An estimated 251,000 people died by gun in 2016. In 1990, there were 209,000 firearm-related deaths

Gun deaths are mostly concentrated in six countries that account for less than 10% of the world's population

(CNN) Mass shootings and acts of terrorism may dominate headlines, but it's the homicides and, to a lesser extent, the suicides that happen out of the spotlight that make up the bulk of firearm-related deaths around the world, according to a study published Tuesday in the journal JAMA.

in 195 countries and territories. More gun deaths happened outside of war than in it during the years researchers examined (1990 through 2016)in 195 countries and territories.

Worldwide, an estimated 251,000 people died by gun in 2016. In 1990, there were 209,000 firearm-related deaths. Accounting for population growth, that's an annualized rate decrease of 0.9%.

Gun deaths are predominantly concentrated in six countries that make up less than 10% of the world's population. The United States, Brazil, Mexico, Colombia, Venezuela and Guatemala together account for more than half of the gun-related deaths worldwide.

In 2016, the majority of global firearm deaths -- an estimated 64% -- were homicides. Suicides accounted for 27% of the gun deaths. A small fraction, about 9% of gun deaths, were accidental.