| Line of Business | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 |
| Petroleum | 6.2 | 7.3 | 6.7 | 9.5 | 7.0 | 5.6 | 6.4 | 5.6 | 5.7 | 10.1 | 10.8 |
| U.S. Petroleum | 4.9 | 6.3 | 5.8 | 7.9 | 4.9 | 4.4 | 4.9 | 5.2 | 4.0 | 9.9 | 10.3 |
| Oil and Gas Production | 4.1 | 2.8 | 2.9 | 8.5 | 5.1 | 5.9 | 5.3 | 5.5 | 4.4 | 14.1 | 12.9 |
| Refining/Marketing | 2.9 | 14.7 | 11.5 | 5.1 | 2.0 | -0.4 | 3.4 | 3.6 | 1.0 | 4.4 | 6.7 |
| Pipelines | 12.8 | 9.6 | 10.2 | 11.2 | 10.7 | 8.4 | 6.4 | 7.6 | 9.1 | 6.9 | 6.8 |
| Foreign Petroleum | 9.5 | 9.9 | 8.7 | 12.5 | 11.0 | 7.9 | 9.2 | 6.2 | 8.4 | 10.6 | 11.5 |
| Oil and Gas Production | 12.4 | 9.2 | 8.9 | 13.1 | 9.1 | 8.2 | 8.6 | 6.5 | 9.3 | 12.8 | 11.9 |
| Refining/Marketing | 4.7 | 11.6 | 8.0 | 11.2 | 14.6 | 7.8 | 10.6 | 6.1 | 7.2 | 6.0 | 10.5 |
| International Marine | -3.6 | 6.8 | 12.4 | 11.7 | 15.6 | -1.2 | 1.2 | -2.0 | -2.5 | 2.2 | 11.8 |
| Coal | 5.1 | 6.7 | 5.0 | 3.3 | 8.7 | -9.3 | 7.6 | 4.0 | 6.9 | 9.9 | 7.2 |
| Other Energy | 0.5 | -2.5 | -2.3 | 2.6 | 2.8 | 1.8 | 4.1 | 4.8 | 6.1 | 7.9 | 6.5 |
| Nonenergy | 12.2 | 20.3 | 17.3 | 7.8 | 2.9 | 2.1 | 4.7 | 10.5 | 19.4 | 15.0 | 11.1 |
| Note: Return on investment measured as contribution to net income/net investment in place. | |||||||||||
| Source: Energy Information Administration, Form EIA-28 (Financial Reporting System). | |||||||||||