U.S. R&D investment totaled nearly $293 billion in 2000 constant dollars (or $340 billion in current dollars), more than any other nation and more than all other G7 countries combined.
SOURCE: Appendix Table 4-35, Science and Engineering Indicators 2008, National Science Foundation, http://www.nsf.gov/statistics/seind08.
NOTES: (*) Data for China and India are taken from UNESCO Institute for Statistics (UIS), Data Centre, http://www.uis.unesco.org. Accessed October 2007.
Figure 1. R&D investment by selected country: 1981-2006
DIGEST OF KEY SCIENCE AND ENGINEERING INDICATORS 2008 – General Science and Engineering Indicators