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Share-based payments (Tables)
6 Months Ended
Jun. 30, 2023
Share-based payments [Abstract]  
Weighted average fair value and exercise prices of options granted
   
For the three months ended
June 30,
   
For the six months ended
June 30,
 
   
2023
   
2022
   
2023
   
2022
 
   

$
   
$
   
$
   
$
 
Weighted average exercise price
   
57.51
     
28.86
     
63.94
     
25.47
 
Weighted average fair value
   
35.14
     
17.91
     
39.52
     
15.62