| Percent of total contributions to GOP | |||
| Contributions by Industry | 2004 | 2002 | 2000 |
| Pharmaceuticals/Health Products | 66% | 74% | 69% |
| Health Professionals | 63% | 62% | 57% |
| Health | 62% | 65% | 60% |
| Insurance | 68% | 69% | 65% |
| Oil & Gas | 81% | 80% | 78% |
| Energy/Natural Resources | 75% | 73% | 74% |
| Agribusiness | 71% | 72% | 74% |
| Commercial Banks | 64% | 63% | 63% |
| Construction | 71% | 69% | 68% |
| Defense | 62% | 65% | 64% |
| Telephone Utilities | 62% | 59% | 59% |
| Tobacco | 72% | 79% | 84% |
| Transportation | 74% | 71% | 72% |