Survey on Human Resources in Science and Technology National results Degree of relationship between the main job and the doctoral studies, by doctoral area. Units: percentage ,Total,High,Intermediate,Low, Total,100.00,60.65,21.82,17.53, Natural sciences,29.14,18.67,5.63,4.84, Engineering and technology,9.38,6.25,1.64,1.49, Medical sciences,22.91,10.44,6.74,5.73, Agricultural sciences,3.75,2.29,0.68,0.78, Social sciences,21.27,15.29,3.89,2.09, Humanities,13.55,7.71,3.24,2.60, Notes: Source: National Statistics Institute