| 年份 | 乌东德 | 白鹤滩 | 溪洛渡 | 向家坝 | 三峡 | 梯级合计 |
| 1954 | 8.64 (35.39%) | 75.00 (100.00%) | 46.51 (100.00%) | 9.03 (100.00%) | 9.54 (4.30%) | 148.71 (39.50%) |
| 1968 | 0.00 (0.00%) | 43.88 (58.50%) | 4.55 (9.78%) | 0.38 (4.20%) | 5.31 (2.40%) | 54.11 (14.37%) |
| 1981 | 0.00 (0.00%) | 52.56 (70.08%) | 0.00 (0.00%) | 0.00 (0.00%) | 0.00 (0.00%) | 52.56 (13.96%) |
| 1982 | 0.00 (0.00%) | 57.16 (76.22%) | 0.00 (0.00%) | 0.00 (0.00%) | 0.00 (0.00%) | 57.16 (15.18%) |
| 1998 | 0.00 (0.00%) | 75.00 (100.00%) | 2.83 (6.08%) | 0.00 (0.00%) | 0.00 (0.00%) | 77.83 (20.68%) |
| 2020 | 0.00 (0.00%) | 75.00 (100.00%) | 3.65 (7.84%) | 0.00 (0.00%) | 0.00 (0.00%) | 78.65 (20.89%) |