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Science and Engineering State Profiles and R&D Patterns: 1997-98
The data brief from the National Science Foundation reports that two-thirds of all U.S. research and development (R&D) expenditures in 1997 were concentrated in just ten states. The brief also graphically presents the ten-year trends for state R&D expenditures. Also of note are the state rankings by R&D intensity, as measured by R&D expenditures as a percentage of gross state product.
Link
http://www.nsf.gov/statistics/nsf00329/pdf/nsf00329.pdf