US Violent Crime Rates
During the 60's., there were 381,796 cases of violent crime on average per year. The total number of violent crimes was 3,817,960. This era was the least violent era of the ones mentioned.
In the 70's there were 960,793 cases involving some sort of violent crime on average. The total was 9,607,930.
Through the 90's, the average crimes-per-year was 1,753,121. There was a total of 17,531,214 violent crimes during this decade.
From 2000 to 2014, there was an average number of violent crimes totaling 20,873,619. Violence went down by 16% though. (Average was 1,490,973.)
During the 80's, violent crime included 1,407,329 cases on average. The grand total of this decade though was 14,073,292.