| Year | Extracted water MCM | 25% Technical loss | Consumed Water MCM | 15% Technical loss | Consumed Water MCM | 10% Technical loss | Consumed Water MCM |
| 1986 | 134.7 | 33.7 | 101 | 20.2 | 114.5 | 13.5 | 121.2 |
| 1987 | 150.3 | 37.6 | 112.7 | 22.5 | 127.8 | 15 | 135.3 |
| 1988 | 164.5 | 41.1 | 123.4 | 24.7 | 139.8 | 16.5 | 148.1 |
| 1989 | 170.1 | 42.5 | 127.6 | 25.5 | 144.6 | 17 | 153.1 |
| 1990 | 174.6 | 43.7 | 131 | 26.2 | 148.4 | 17.5 | 157.1 |
| 1991 | 178.5 | 44.6 | 133.9 | 26.8 | 151.7 | 17.9 | 160.7 |
| 1992 | 208.1 | 52 | 156.1 | 31.2 | 176.9 | 20.8 | 187.3 |
| 1993 | 218.6 | 54.7 | 164 | 32.8 | 185.8 | 21.9 | 196.7 |
| 1994 | 219.9 | 55 | 164.9 | 33 | 186.9 | 22 | 197.9 |
| 1995 | 246.2 | 61.6 | 184.7 | 36.9 | 209.3 | 24.6 | 221.6 |
| 1996 | 242.3 | 60.6 | 181.7 | 36.3 | 206 | 24.2 | 218.1 |
| 1997 | 239.8 | 60 | 179.9 | 36 | 203.8 | 24 | 215.8 |
| 1998 | 241.5 | 60.4 | 181.1 | 36.2 | 205.3 | 24.2 | 217.4 |