1 in 5 U.S. adults experience mental illness each year
1 in 25 U.S. adults experience serious mental illness each year
1 in 6 U.S. youth aged 6-17 experience a mental health disorder each year
50% of all lifetime mental illness begins by age 14, and 75% by age 24
Suicide is the 2nd leading cause of death among people aged 10-34 

From the National Alliance on Mental Illness at:  https://www.nami.org/mhstats