加拿大有个研究？哪个研究？放狗找了一下，你的“研究”实在不靠谱。

The homicide rate in Canada peaked in 1975 at 3.03 per 100,000 and has dropped since then; it reached lower peaks in 1985 (2.72) and 1991 (2.69). It reached a post-1970 low of 1.73 in 2003. The average murder rate between 1970 and 1976 was 2.52, between 1977 and 1983 it was 2.67, between 1984 and 1990 it was 2.41, between 1991 and 1997 it was 2.23 and between 1998 to 2004 it was 1.82.^[18] The attempted homicide rate has fallen at a faster rate than the homicide rate.^[19]

By comparison, the homicide rate in the U.S. reached 10.1 per 100,000 in 1974, peaked in 1980 at 10.7 and reached a lower peak in 1991 (10.5). The average murder rate between 1970 and 1976 was 9.4, between 1977 and 1983 it was 9.6, between 1984 and 1990 it was 9, between 1991 and 1997 it was 9.2 and between 1998 and 2004 it was 6.3. In 2004, the murder rate in the U.S. dipped below 6 per 100,000, for the first time since 1966, and as of 2010 stood at 4.8 per 100,000 ^[17]

Approximately 70 percent of the total murders in the U.S. are committed with firearms, versus about 30 percent in Canada.^[20]

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