FIGURE R&D-10 Trends in federal research by field, FY 1970-FY 2004, in obligations of billions of constant FY 2004 dollars.
SOURCE: American Association for the Advancement of Science. Chart: Trends in Federal Research by Discipline: FY 1970-2004. Washington, DC: American Association for the Advancement of Science, February 2005. Available at: http://www.aaas.org/spp/rd/discip04.pdf.