| English, education | 34.4% |
| Economy, business | 17.9% |
| Medical sciences | 13.5% |
| Reference materials | 10.7% |
| Biology, ecology | 3.8% |
| Americana, political sciences | 2.0% |
| Mathematics, computer science | 1.9% |
| Psychology | 1.8% |
| Law | 1.3% |
| Art, literature | 1.2% |
| Sociology | 1.1% |
| Technical sciences | 1.0% |
| Chemistry, physics | 1.0% |
| Other | 8.4% |
| TOTAL: | 100% |