- Hydrogeology 30
- Geoengineering, Foundations, Hydraulics 27
- Optical and Electronic Materials 24
- Atmospheric Protection/Air Quality Control/Air Pollution 23
- Economics, general 20
- Electrical Engineering 20
- Geriatrics/Gerontology 18
- Public Health 18
- Teaching and Teacher Education 18
- Environmental Health 17
- Oncology 17
- Population Economics 17
- Aging 16
- Medical Sociology 16
- Nanotechnology 16
- Semiconductors 14
- Solid State Physics 14
- Educational Policy and Politics 13
- Materials Engineering 13
- Polymer Sciences 13