Exhibit 7.1

RATIOS OF EARNINGS TO FIXED CHARGES

The following table sets out our ratios of earnings to fixed charges for each of the five years ended 31 December 2015, 2014, 2013, 2012
and 2011 based on information derived from our consolidated financial statements, which are prepared in accordance with International Financial Reporting Standards (IFRS).



|                                                                       |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|---------------------------------------------------------------------- |  | ---------------------- | ------ |  | ---- |  | ------ | ---- |  |  | ------- |  |  | ------- | ------ |  |  |  | ------ | 
|                                                                       |  | Year ended 31 December |       
|                                                                       |  | 2015                   |        |  | 2014 |  |        | 2013 |  |  | 2012(1) |  |  | 2011(1) |       
|Earnings:                                                              |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|Profit from operations before taxes and share of results of associates |  |                        | 12,451 |  |      |  | 13,792 |      |  |  | 18,240  |  |  |         | 10,380 |  |  |  | 9,062  | 
|Add: Fixed charges (below)                                             |  |                        | 2,200  |  |      |  | 2,366  |      |  |  | 2,389   |  |  |         | 2,361  |  |  |  | 3,702  | 
|Less: Interest capitalized (below)                                     |  |                        | 28     |  |      |  | 39     |      |  |  | 38      |  |  |         | 57     |  |  |  | 110    | 
|                                                                       |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|Total earnings                                                         |  |                        | 14,623 |  |      |  | 16,119 |      |  |  | 20,591  |  |  |         | 12,684 |  |  |  | 12,654 | 
|                                                                       |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|Fixed charges:                                                         |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|Interest expense and similar charges                                   |  |                        | 1,805  |  |      |  | 1,969  |      |  |  | 2,005   |  |  |         | 2,008  |  |  |  | 3,216  | 
|Accretion expense                                                      |  |                        | 289    |  |      |  | 266    |      |  |  | 261     |  |  |         | 209    |  |  |  | 286    | 
|Interest capitalized                                                   |  |                        | 28     |  |      |  | 39     |      |  |  | 38      |  |  |         | 57     |  |  |  | 110    | 
|Estimated interest portion of rental expense                           |  |                        | 78     |  |      |  | 92     |      |  |  | 85      |  |  |         | 87     |  |  |  | 90     | 
|                                                                       |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|Total fixed charges                                                    |  |                        | 2,200  |  |      |  | 2,366  |      |  |  | 2,389   |  |  |         | 2,361  |  |  |  | 3,702  | 
|                                                                       |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 
|Ratio of earnings to fixed charges                                     |  |                        | 6.65   |  |      |  | 6.81   |      |  |  | 8.62    |  |  |         | 5.37   |  |  |  | 3.42   | 
|                                                                       |  |                        |        |  |      |  |        |      |  |  |         |  |  |         |        |  |  |  |        | 



Notes:



|(1) | 2011 and 2012 as reported, adjusted to reflect the changes on the segment reporting.
|--- | ------------------------------------------------------------------------------------

The
ratio of earnings to fixed charges represents the number of times fixed charges are covered by earnings. For purposes of computing this ratio, earnings consist of profit from operations before taxes and share of results of associates, plus fixed
charges, minus interest capitalized during the period. Fixed charges consist of interest and accretion expense, interest on finance lease obligations, interest capitalized, plus one-third of rent expense on operating leases, estimated by us as
representative of the interest factor attributable to such rent expense.

We did not have any preferred stock outstanding and did not pay
or accrue any preferred stock dividends during the periods presented above.