Suspect no MORE!
I'm quite sure there is data available about the visitors to THIS fine institution; located in an area that is 57% Mormon; that will satisfy even the most picky of information gatherers...
http://mormonmatters.org/2009/09/16/what-mormon-prisoners-want/
You show a 57% Mormon population in an over 60% Mormon population state, but how many of those are temple Mormons? What is the population of Mormons in the prison? What is the population of active Mormons in the prison? What is the percentage of temple Mormons in the prison? Nearly 0% I suspect. In looking through suits to the Federal Government by Mormons in prison I have not seen one that requested permission to wear garments.
The truth is there are not really very many Mormons in prison. When a Mormon is convicted of a felony they have a court or disciplinary council as they call it and are normally excommunicated. When they have served all their time and have no more obligations to the state/Fed and generally 12 months after that they can petition The Church for re-baptism and become a Mormon again.
This is not a problem for inactive Mormons they probably didn’t want home teachers coming to bother them anyway but for a person who simply had a lapse in judgment it would be excruciating. To an active Mormon, church and ordinances of the church are a very big part of their lives.