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Earning Per Share (Tables)
12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Summary of Earnings Per Share

The following table shows the net income and the number of shares that have been used for the calculation of the basic and diluted earnings per share:

 

     2017      2016      2015  

Net income

     12,340        (28,237      4,579  

Average number of shares outstanding

     392,625,259        391,497,615        392,101,191  

Basic and diluted earnings per share

     31.43        (72.13      11.68