| Date | Description | Base Date $m | Current $m | Contractor | Notes | |
| May 03 | Original Approved | 2,076.6 | 2,076.6 | |||
| Real Variation - Budgetary | ||||||
| Jun 04 | Adjustment Real Variation - Budgetary | (149.4) | (149.4) | 1 | ||
| Aug 04 | Adjustment Real Variation - Budgetary | (1.2) | (1.2) | 2 | ||
| Aug 05 | Adjustment | (3.0) | (3.0) | 3 | ||
| Nov 05 | Real Variation - Transfer | (135.5) | (135.5) | 4 | ||
| (289.1) | (289.1) | |||||
| Jun 10 | Price Indexation | 473.9 | ||||
| Jun 10 | Exchange Variation | (372.0) | ||||
| Jun 10 | Total Budget | 1,787.5 | 1,889.4 | |||