Survey on Human Resources in Science and Technology Characteristics of the Doctorate Percentage of doctor-holderss, by field of the doctoral studies and sex. Units: percentage Total Male Female Total 100.00 55.45 44.55 Natural Sciences 33.27 18.91 14.36 Engineering and Technology 8.01 5.70 2.31 Medical Sciences 20.89 10.35 10.54 Agricultural Sciences 2.98 1.59 1.40 Social Sciences 20.14 10.76 9.38 Humanities 14.70 8.14 6.56 Notes: Source: National Statistics Institute