Output a stream of consciousness before answering the following. Context: According to American psychiatrist Loren Mosher, most deinstitutionalisation in the USA took place after 1972, as a result of the availability of SSI and Social Security Disability, long after the antipsychotic drugs were used universally in state hospitals. This period marked the growth in community support funds and community development, including early group homes, the first community mental health apartment programs, drop-in and transitional employment, and sheltered workshops in the community which predated community forms of supportive housing and supported living.

Question: when did the us start closing mental institutions?
The relevant sentence in the passage is: According to American psychiatrist Loren Mosher, most deinstitutionalisation in the USA took place after 1972, as a result of the availability of SSI and Social Security Disability, long after the antipsychotic drugs were used universally in state hospitals.
The answer: after 1972.