low-rate

you had a very unique combination of events.First, a very low rate of returndue to the 1914 and 1945 war shocks,

very early on in their HIV epidemics,and they have a very low rate of HIVamong injecting drug users.

the fact that it can’t hide out in other species,and its relatively low mutation rate.

This is from the FBI uniform crime statistics.You can see that there's a fairly low rate of violence in the '50s and the '60s,then it soared upward for several decades

But doesn't this high incarceration ratepartly account for our really low crime rate?Crime is down. That's a good thing.