"Overall, 92 percent of clients who received outpatient services received care voluntarily, while the other 8 percent received care involuntarily."

Source

Substance Abuse and Mental Health Services Administration, National Mental Health Services Survey (N-MHSS): 2016. Data on Mental Health Treatment Facilities. BHSIS Series S-98, HHS Publication No. (SMA) 17-5049. Rockville, MD: Substance Abuse and Mental Health Services Administration, 2017, p. 29.
https://www.samhsa.gov/data/m…
https://www.samhsa.gov/data/s…