| 1988 | 1889 | 1990 | 1991 | 1992 | 1993 | 1994 | |
| Energía primaria autoconsumida | |||||||
| Renovable | 646 | 585 | 573 | 411 | 378 | 369 | 413 |
| No renovable | 386 | 360 | 350 | 348 | 348 | 340 | 350 |
| Total | 1.032 | 945 | 923 | 759 | 726 | 709 | 763 |
| Energía primaria importada | |||||||
| Petróleo | 5.728 | 5.662 | 5.531 | 6.010 | 6.081 | 6.142 | 5.847 |
| Carbón | 1.091 | 1.155 | 1.738 | 1.950 | 2.350 | 2.378 | 2.203 |
| Gas natural | 36 | 223 | 222 | 274 | 326 | 347 | 408 |
| Intercambios | 2.909 | 3.049 | 3.014 | 2.990 | 2.877 | 2.886 | 2.704 |
| Total | 9.764 | 10.089 | 10.505 | 11.224 | 11.634 | 11.753 | 11.162 |
| Total | 10.796 | 11.034 | 11.428 | 11.983 | 12.360 | 12.462 | 11.925 |