Suicides by gun accounted for about six of every 10 firearm deaths in 2010 and just over half of all suicides, according to data from the Centers for Disease Control and Prevention.
Since the CDC began publishing data in 1981, gun suicides have outnumbered gun homicides. But as gun homicides have declined sharply in recent years, suicides have become a greater share of all firearm deaths: the 61% share in 2010 was the highest on record.
Suicides account for most gun deaths | Pew Research Center