"Create a Report" With "Prior Unit" Column?

I am an executive secretary in a Young Single Adult ward. Our ward pulls from several different home stakes. We would like to generate a report that includes the "Prior Unit" column, so that we can more easily find out which home wards (and stakes) our YSA members come from. I am not able to see the "Prior Unit" column as one of the selectable columns on the report I am trying to create. Can the Prior Unit column be made available in the list of selectable columns?