| Date | Description | Base Date $m | Current $m | Contractor | Notes | |
| Mar 99 | Original Approved | 1,584.0 | 1,584.0 | |||
| Oct 02 | Real Variation - Transfers | (18.2) | (18.2) | 1 | ||
| Dec 03 | Real Variation - Transfers Real Variation - Budgetary | (59.1) | (59.1) | 2 | ||
| Aug 04 | Adjustments | (2.2) | (2.2) | 3 | ||
| Sep 04 | Real Variation - Transfers | (3.0) | (3.0) | 4 | ||
| Jun 05 | Real Variation - Transfers Real Variation - Budgetary | (4.0) | (4.0) | 5 | ||
| Aug 05 | Adjustments | (4.5) | (4.5) | 6 | ||
| (91.0) | (91.0) | |||||
| Jun 10 | Price Indexation | 414.9 | ||||
| Jun 10 | Exchange Variation | 168.4 | ||||
| Jun 10 | Total Budget | 1,493.0 | 2,076.3 | |||