48 years at the most. This is where youths are sent to the confined facility, that is, the youth detention center, and it has the strong characteristic of detainment. The daily average number of youths in 10 different youth detention centers was 1,132 as of 2016. 2) Questions 230. Why are the days spent under pre-trial detention or juvenile classification not included in the period of protective disposition in youth detention center? What legal efforts are made to improve this issue?