| Decade | Dams Built | Total Dam Volume |
| 185x | 15 | 20044 |
| 186x | 10 | 12422 |
| 187x | 26 | 100423 |
| 188x | 26 | 201617 |
| 189x | 28 | 134881 |
| 190x | 60 | 152000 |
| 191x | 106 | 4169872 |
| 192x | 150 | 3458148 |
| 193x | 81 | 919230 |
| 194x | 88 | 8760456 |
| 195x | 247 | 21495851 |
| 196x | 279 | 21447434 |
| 197x | 124 | 14602605 |
| 198x | 103 | 1028808 |
| 199x | 47 | 229616 |
| 200x | 2 |