The monograph summarizes national, regional, and state expenditure data for mental retardation (MR)/developmental disabilities (DD) services from fiscal year 1977-84. Data were compiled through responses of MR/DD state agency officials to data extracted from state excecutive budget documents. The project was designed to (1) develop a methodology for accomplishing annual or biennial updates of MR/DD spending trends in the states and throughout the nation and (2) to determine comparative funding levels and patterns for community and institutional services in the 50 states. The report displays digitally plotted graphics in four topic areas: expenditure data aggregated across the 50 states for the 8-year period; the ratio of institutional expenditures (including state and federal funds for state-operated facilities and centers, and state schools) per dollar of community expenditures for each state; nationwide fiscal trends and service statistics in income maintenance and special education programs (including Social Security Disability Insurance and Public Law 94-142); and state-by-state comparative data on institutional and community services expenditures. (CL)