Final answer:
Approximately 75% of youth experience mental health issues based on a survey conducted by the National Institute of Mental Health.
Step-by-step explanation:
According to the information provided in the National Institute of Mental Health survey, approximately 75% of the 250 students surveyed reported having some kind of mental health issue at some point in their life. While the question does not specify whether the percentage refers to the total youth population, it can be inferred that a significant proportion of youth experience mental health issues based on the survey results. Examining reports from the Surgeon General and organizations like HUD and the Department of Labor can provide further context about mental health parity and services available to youths in the United States, including those in facilities. However, to find the specific percentage requested, one would need to refer to more targeted studies or statistical data concerning youth institutions specifically.