Made up statistics...check out this linkhttp://webappa.cdc.gov/sasweb/ncipc/mortrate9.html
It is the Center for Disease Contol's Injury Mortality rates for 1991-1998.
The accidental deaths attributed to firearms in 1998 was 866 for the whole country.
Suicide accounted for 17,424 firearms deaths.
Homicide accounted for 11,798 firearms deaths.
"Legal Intervention" accounted for 304 firearms deaths, although I don't have the definition of "legal intervention".
Oddly, "suicide" was included in "Violence related". I typically consider violence to suggest one person harming another, not a person harming themselves.