美国国家科学委员会（NSB）：2024年研究与发展-美国趋势及国际比较报告（英文版）

In 2022, the United States performed an estimated $885.6 billion in research and development (R&D) in current U.S. dollars. This is an increase from 2021 of 12% in current (nominal) dollars and a 5% increase in constant (inflationadjusted) dollars. The business sector is by far the largest performer of U.S. R&D. In 2022, this sector performed an estimated $692.7 billion in domestic R&D (current U.S. dollars), or 78% of U.S. R&D, a 14% increase from the $608.6 billion performed