| Year | Average Rainfall (mm/year) | Qty (Mm3) | Leaked Water (Mm3) | Days of Rainfall | % Rainfall from Average |
| 90-91 | 373.8 | 86.9 | 21.7 | 40 | 106.3 |
| 91-92 | 588.9 | 133.7 | 33.4 | 47 | 166.1 |
| 92-93 | 452.4 | 121.7 | 30.4 | 48 | 126.8 |
| 93-94 | 218.9 | 56.3 | 14.1 | 29 | 60.3 |
| 94-95 | 577.3 | 158.3 | 39.6 | 54 | 165.3 |
| 95-96 | 378.0 | 97.5 | 24.4 | 47 | 106.5 |
| 96-97 | 300.8 | 89.2 | 22.3 | 45 | 87.8 |
| 97-98 | 225.8 | 59.7 | 14.9 | 31 | 64.1 |
| 98-99 | 121.5 | 31.4 | 7.9 | 23 | 32.6 |
| 99-00 | 311.5 | 77.4 | 19.3 | 45 | 85.2 |
| 00-01 | 474.8 | 130.3 | 32.6 | 53 | 132.9 |
| 01-02 | 477.9 | 121.5 | 30.4 | 45 | 130.9 |
| 02-03 | 540.6 | 131.4 | 32.8 | 59 | 145.3 |
| 03-04 | 329.5 | 84.3 | 21.1 | 30 | 90.5 |
| 04-05 | 358.8 | 134.7 | 33.7 | 36 | 104.5 |
| 05-06 | 299.6 | 79.4 | 19.9 | 35 | 83.9 |
| 06-07 | 419.6 | 101.2 | 25.3 | 38 | 115.3 |
| 07-08 | 259 | 63.2 | 15.8 | 26 | 72.1 |
| 08-09 | 316.7 | 103.5 | 25.9 | 25 | 87.0 |
| 09-10 | 220.6 | 73.4 | 18.4 | 32 | 61.0 |
| 10-11 | 233.2 | 77.9 | 19.5 | 34 | 60.0 |
| 11-12 | 394.2 | 131.9 | 33 | 45 | 109.4 |