| Process | 1974 | 1981 | 1997 | 1999 | ||
| All | Incumbents | Entrants | Downstream capacity as a percent of crude distillation capacity | |||
| Alkylation | 4.8 | 5.3 | 7.5 | 6.8 | 7.4 | 6.0 |
| Catalytic Cracking | 27.7 | 30.4 | 35.9 | 35.0 | 35.8 | 34.0 |
| Catalytic Reforming | 17.6 | 22.4 | 23.4 | 22.4 | 22.3 | 22.5 |
| Coking | n.a. | n.a. | 12.6 | 12.5 | 12.9 | 12.0 |
| Hydro Cracking | 5.6 | 5.7 | 9.6 | 9.9 | 10.9 | 8.6 |
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