[AntiGuv]

To be clear, for enumeration purposes, "special groups" include college students, military personnel, prison populations, and transient persons, etc..

[AntiGuv]

To be even more clear, 'transient' = homeless. Also institutional populations such as nursing homes and mental health centers were "special groups" for enumeration purposes. Dunno what you need this for, so just being thorough!

Have fun with your research.