"According to the National Alliance to End Homelessness, about 550,000 unaccompanied youth spend more than a week homeless each year, yet fewer than 10 percent are served by homeless youth programs, and there are only 4,800 beds funded by the Runaway and Homeless Youth Act available at any given time."
http://www.huffingtonpost.com/kevin-m-ryan/homeless-kids-need-this-s_b_5927506.html