**Exhibit 7.1**

**AureliaEnergy N.V.Computation of Ratios**

| ** **                                                                                        | ** ** | **2000** | ** ** | **2001** | ** ** | **2002** | ** ** | **2003** | ** ** | **2004** | ** ** | **2005** | ** ** |
|---------------------------------------------------------------------------------------------------|------------|----------|------------|----------|------------|----------|------------|----------|------------|----------|------------|----------|------------|
| Pretax income  from cont. oper. before adj. For min. int  or income or loss from equity investees |       | 37,929   |       | 31,266   |       | 13,763   |       | 11,514   |       | 5,920    |       | 2,045    |       |
| plus fixed charges:                                                                               |       |     |       |     |       |     |       |     |       |     |       |     |       |
| —interest  expensed or                                                                       |       | 36,116   |       | 28,776   |       | 48,898   |       | 45,120   |       | 44,940   |       | 54,464   |       |
| capitalized                                                                                       |       | 0        |       | 0        |       | 3,549    |       | 6,062    |       | 385      |       | 0        |       |
| —amortized  premiums, discounts and capitalized expenses related to indebtedness             |       | 710      |       | 710      |       | 2,395    |       | 2,651    |       | 2,730    |       | 2,938    |       |
| —an estimate of  the interest within rental expense                                          |       | 61       |       | 63       |       | 91       |       | 120      |       | 128      |       | 140      |       |
| —preference  security dividend req. of consolidated sub.                                     |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       |
| **Total fixed charges**                                                                           |       | 36,887   |       | 29,549   |       | 54,932   |       | 53,953   |       | 48,183   |       | 57,542   |       |
| plus amortization of capitalized interest                                                         |       | 2,728    |       | 2,487    |       | 2,003    |       | 2,481    |       | 3,151    |       | 3,181    |       |
| plus distributed  income to equity investors                                                      |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       |
| plus the share of pre-tax losses of equity investees                                              |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       |
| less interest  capitalized                                                                        |       | 0        |       | 0        |       | 3,549    |       | 6,062    |       | 385      |       | 0        |       |
| less interest accrued subordinated Marenco loan                                                   |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       |
| less preference  security dividend req. of consolidated subsidiaries                              |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       |
| less minority  interest in pre-tax income                                                         |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       | 0        |       |
| **Earnings**                                                                                      |       | 77,544   |       | 63,302   |       | 67,149   |       | 61,886   |       | 56,869   |       | 62,768   |       |
| **Fixed charges**                                                                                 |       | 36,887   |       | 29,549   |       | 54,932   |       | 53,953   |       | 48,183   |       | 57,542   |       |
| **Ratio of earnings to fixed charges**                                                            |       | 2.10     |       | 2.14     |       | 1.22     |       | 1.15     |       | 1.18     |       | 1.09     |       |
| **Cash interest expense (Interest paid)**                                                         |       | 28,232   |       | 20,738   |       | 41,829   |       | 39,722   |       | 35,169   |       | 39,930   |       |
| **EBITDA**                                                                                        |       | 128,363  |       | 107,430  |       | 111,800  |       | 104,239  |       | 117,576  |       | 162,785  |       |
| **EBITDA/Cash interest expense**                                                                  |       | 4.55     |       | 5.18     |       | 2.67     |       | 2.62     |       | 3.34     |       | 4.08     |       |
| **Net debt**                                                                                      |       | 322,459  |       | 530,864  |       | 558,079  |       | 554,518  |       | 503,307  |       | 672,166  |       |
| **Net  Debt/EBITDA**                                                                              |       | 2.51     |       | 4.94     |       | 4.99     |       | 5.32     |       | 4.28     |       | 4.13     |       |

 

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