200 



1128 



SCIENTIFIC AND TECHNOLOGICAL COOPERATION 



4.0 r- 



< 3.0 



I- 

 O 

 I- 



UL 



O 2.0 



1.0 



1966 1968 1970 1972 1974 1976 1978 1980 

 YEAR 



400 I- 



r 



Total All Fields 



\ 



\ 



/ 



/ 





. Engineering, Mathematical, and 

 \physical Sciences 



' •• Biological and Medical Sciences 



Social and Agricultural Sciences _ _ 



'l I I I I I I ' I T" I ^T' 



J L 



^ 



1966 1968 1970 1972 1974 1976 1978 1980 



YEAR 



FIGURE 3 Number and percent of U.S. Ph.D.s in science and engineering with 

 firm commitments for postdoctoral study abroad. 



