Materia
- Environmental Science 6
- Psychology 6
- Philosophy 5
- Art 4
- Earth and Environmental Sciences 4
- Geography 4
- Music 4
- Sociology 4
- Architecture 3
- Computer Science 3
- History of Science: General Interest 3
- Religion 3
- Statistics and Probability 3
- Anthropology 2
- Archaeology 2
- Asian Studies 2
- Economics: General Interest 2
- General 2
- Psychiatry 2
- Soil Science 2