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Major exchange rates (Tables)
12 Months Ended
Dec. 31, 2023
Effects Of Changes In Foreign Exchange Rates [Abstract]  
Major exchange rates used in the financial statements
The following major exchange rates have been used in preparing the consolidated financial statements:
 closing ratesaverage rates
1 XXX = x,xxxx USDDecember 31, 2023December 31, 2022December 31, 2021202320222021
EUR1.1050 1.0666 1.1326 1.0797 1.0555 1.1894 
GBP1.2715 1.2026 1.3479 1.2408 1.2415 1.3778