Number of Juveniles Held in Adult Jails in the US
"About 4,200 juveniles age 17 or younger were held in local jails at midyear 2014. They accounted for 0.6% of the confined population, down from 1.2% at midyear 2000. Nearly 90% or 3,700 juvenile inmates were tried or awaiting trial in adult court. The number of juveniles not charged as an adult declined by 74% between midyear 2010 and 2014 (from 1,900 to 500 inmates)."