This link
http://www.nsf.gov/statistics/seind12/slides_tn.htm#g3
provides excellent data (in ppt and excel formats) included in the pdf overview of the S&E Indicators report which focuses on the trend in the United States and many other parts of the world toward the development of more knowledge-intensive economies in which research, its commercial exploitation, and other intellectual work are of growing importance. Industry and government play key roles in these changes. The pdf report can also be accessed.
Great source!
Passionate about innovation, engineering education and promoting partnerships for economic and social development. Born in Puerto Rico, an engineer, past professor of chemical engineering, working for the largest IT company in the world and winner of the 2006 US National Academy of Engineering Gordon Prize.
Excellent data Lueny! Thank you!!!