It's been dropping since the 90s, but so far as I can tell there has been a large increase in violent crime rates since the 60s. If we're at a 50 year low in r

It's been dropping since the 90s, but so far as I can tell there has been a large increase in violent crime rates since the 60s. If we're at a 50 year low in rates, what does that mean for the total number of violent crimes? Which raises other questions. Has our militarized police force contributed to declining crime in the past 20 years? If so, to what extent?