[jnaddef]

Again you are comparing apples with oranges. Outside of prison, nothing prevents you from attempting suicide. Whether you succeed or not depends mostly on your resolve and how you do it.

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.

[jacobush]

No that is not a perfect prison. A perfect prison should probably be more like the general population. Unless you think the perfect prison is chained to the wall at all times. And that prison is no place for rehabilitation.

[jnaddef]

Sure, I thought it was obvious I meant : "in a perfect high-security cell where the goal is to keep the prisoner from killing himself before testifying"