FIGURE 8-1a Rates of suicide by firearm in the first year after purchase among persons who purchased handguns in California in 1991. The horizontal line indicates the age- and sex-adjusted average annual rate of suicide by firearm in California in 1991 and 1992 (11.3 per 100,000 persons per year). SOURCE: Wintemute et al. 1999. Copyright © 1999 Massachusetts Medical Society. All rights reserved.