Global Research and Development Expenditures: Fact Sheet [Updated September 27, 2021] [open pdf - 1MB]
From the Document: "Research and development (R&D) plays a central role in advanced economies in areas such as economic growth and job creation, industrial competitiveness, national security, energy, agriculture, transportation, public health and well-being, environmental protection, and expanding the frontiers of human knowledge understanding. Accordingly, companies, governments, universities, nonprofit organizations, and others around the world have made substantial investments in R&D. Since 2000, total global R&D expenditures have more than tripled in current dollars, from $677 billion to $2.2 trillion in 2019."
CRS Report for Congress, R44283
Congressional Research Service: https://crsreports.congress.gov/