This document contains statistics on mental illness and organized mental health service delivery systems. Data sources cited include the National Institute of Mental Health, state mental health agencies, universities in the Epidemiological Catchment Area program, the National Center for Health Statistics, and the National Association of State Mental Health Program Directors. Included are the latest data on prevalence of mental disorders; trends in availability, volume, staffing, and expenditures of organized specialty mental health services in the United States, including the characteristics of patients who use these services; the features of organized specialty mental health services in each state; national mental health expenditures; revenues and expenditures of each state mental health agency; and trends in suicide. The document highlights trends in prevalence of mental disorders, mental health service delivery, expenditures, revenues, and suicide. Most of the document consists of statistics on the various topics. Appendices include sources and qualifications of data contained in specific chapters, a glossary of terms, and a list of contacts for further information. Ninety-one data tables and 17 figures are included. (ABL)