Statistics about correctional officers

[snopes]

Comment: I had read these statistics about correctional officers
circulated in an email, and I was wondering what, if any, were true:

Correctional Officers (CO's) have the second highest mortality rate of any
occupation.

33.5% of all assaults in prisons and jails are committed by inmates
against staff.

A CO's 58th birthday, on average, is their last.

A CO will be seriously assaulted at least twice in a 20 year career.

On average a CO will live only 18 months after retirement.

CO's have a 39% higher suicide rate than any other occupation and
have a higher divorce and substance abuse rates then the general population.