Survey on Human Resources in Science and Technology 
National results
Percentage of practising doctors who carried out research  activities at 31/12/2006, by doctoral area and employment sector.
Units: percentage

	Total	Companies	Public Administrations	Higher education	PNPI	
Total	100.00	8.16	29.31	58.34	4.19	
Natural sciences	31.30	2.72	8.49	18.48	1.61	
Engineering and technology	10.34	0.82	1.49	7.55	0.48	
Medical sciences	16.67	2.46	9.95	3.20	1.06	
Agricultural sciences	3.66	0.27	1.30	1.95	0.14	
Social sciences	23.68	1.10	4.14	17.89	0.55	
Humanities	14.35	0.79	3.94	9.27	0.35	
Notes:
Source: National Statistics Institute