By contrast, without Australia's confiscation policy, the United States has seen its murder (including nonnegligent manslaughter) rate drop from 9.3 homicides per 100,000 U.S. residents in 1992 to 4.7 in 2011 and decline further, to 4.5 per 100,000 in 2014, the last year for which full data is available. During this time, the number of firearms in civilian hands increased by roughly 50 percent, to an estimated 300 million.