In an argument against gun control, the National Center for Policy Analysis, a non-profit conservative think tank, reported the following statistics:
New Jersey adopted what sponsors described as "the most stringent gun law" in the nation in 1966; two years later the murder rate was up 46% and the reported robbery rate had nearly doubled.
In 1968, Hawaii imposed a series of increasingly harsh measures and its murder rate tripled from a low of 2.4 per 100,000 in 1968 to 7.2 by 1977.
In 1976, Washington, D.C. enacted one of the most restrictive gun control laws in the nation. Since then, the city's murder rate has risen 134% while the national murder rate has dropped 2%.