| Year | Dry | Irr | Diff | $/tonne | “Value” | Blue water | “Value” | ||
| (tonne/hectare) | cotton | of irrigation | (m3/ha) | per m3 | |||||
| 1997 | 0.462 | 0.712 | 0.250 | $1320.84 | $330.02 | 1584 | $0.21 | ||
| 1998 | 0.325 | 0.759 | 0.434 | $1259.25 | $546.94 | 4117 | $0.13 | ||
| 1999 | 0.440 | 0.643 | 0.203 | $1034.26 | $209.54 | 2385 | $0.09 | ||
| 2000 | 0.244 | 0.548 | 0.303 | $1422.17 | $431.45 | 3738 | $0.12 | ||
| 2001 | 0.340 | 0.739 | 0.400 | $949.75 | $379.76 | 3029 | $0.13 | ||
| 2002 | 0.306 | 0.882 | 0.577 | $656.79 | $378.80 | 2899 | $0.13 | ||
| 2003 | 0.263 | 0.752 | 0.489 | $1011.92 | $494.90 | 3805 | $0.13 | ||
| 2004 | 0.661 | 0.963 | 0.302 | $853.28 | $257.28 | 537 | $0.48 | ||
| 2005 | 0.722 | 1.121 | 0.398 | $1,123.01 | $447.37 | 2145 | $0.21 | ||
| 2006 | 0.329 | 0.991 | 0.662 | $1169.96 | $774.56 | 3045 | $0.25 | ||