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Capital stock (Tables)
12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Movement of Ordinary Shares Issued
 
  c)
Movements in the number of the Company’s ordinary shares outstanding are as follows:
 
    
2019
    
2020
    
2021
 
    
in thousands
    
in thousands
    
in thousands
 
January 1
     727,265        727,240        727,240  
Restricted shares – cancelled
     (25        —          —  
    
 
 
    
 
 
    
 
 
 
December 31
  
 
727,240
 
  
 
727,240
 
  
 
727,240