OPEN MINDS, The Behavioral Health & Social Service Industry Analyst Industry Analysis The last twenty years have been characterized by the emergence of federal, state, and local government benefits as key sources of residential, medical, habilitative, and financial support for individuals with mental retardation and developmental disabilities (MR/DD). More than 96% of Americans with MR/DD, including mental retardation, rely on Supplemental Security Income (SSI), Social Security Disability Income (SSDI), Medicaid, Medicare, and other community assistance funds. Total spending on services and supports for individuals with developmental disabilities . . .