Earlier quoted context omitted.
That means that most people didn't even figure out how to attempt one, because the means were taken away. You should compare with suicides/suicide attempt rates in general population (or general prison population) to make this statement.
https://www.cnn.com/2017/04/19/health/prison-suicides-massac... General prison suicide rate is 20/100,000, which is almost identical to the male general population rate in the US (21.1) ( https://en.wikipedia.org/wiki/List_of_countries_by_suicide_r... ) I didn't quickly get data on attempt/completion in prison, but the attempt/completion rate is the general pop is ~30 attempts/completion, and the completion rate is d…
In a perfect prison, suicide attempt should be 0%, not because people are happy, but because inmates should have no way to even attempt a suicide.
If at some point a mistake is made and an inmate manages to kill himself, it will be a 1 attempt/completion and going to the conclusion that prisons make it easy to kill yourself does not seem right.