| Item | Obligations |
|---|---|
| Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers | $1.2B |
| Research and Development in the Physical, Engineering, and Life Sciences | $1.1B |
| Service Establishment Equipment and Supplies Merchant Wholesalers | $1B |
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $819M |
| All Other Miscellaneous Manufacturing | $794M |
| Petroleum Refineries | $426M |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $352M |
| Home Centers | $339M |
| Advertising Agencies | $310M |
| Engineering Services | $235M |
Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers was the largest industry in Illinois, with $1.2B obligated.