US R&D as % of GDP
1955
1960
1965
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
Total
Business funded
Federally funded
Other nonfederally funded