Volumes present data collected periodically from the 50 states, the District of Columbia, and the United States as a whole of the revenue, spending, and programmatic trends of public spending for intellectual and developmental disabilities services in the United States. The data has been collected as part of a comparative nationwide long-term study begun in 1982 to monitor the growth and development of intellectual and developmental disabilities services on a state by state basis. Longitudinal analysis of this data demonstrates the impact over time of federal, state, and local government fiscal policy. The data illustrate important service delivery trends in the states in community living, public and private residential institutions, family support, supported employment, supported living, and Medicaid Waivers. Demographic data include general population, personal income, total state budget, and Survey of Income and Program Participation data. Collected data from 1977 to present is also available in an online database at http://www.stateofthestates.org/.