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Employee benefits (Tables) | 12 Months Ended
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Dec. 31, 2022
Employee benefits |
Schedule of provision for employee benefits | ​
​ | ​ | ​ | ​ | ​
​ |  | As of |  | As of
​ | ​ | December 31, | ​ | December 31,
Classes of benefits and expenses by employee | ​ | 2022 | ​ | 2021
​ |  | ThUS$ |  | ThUS$
Current |  |  |  |
Profit sharing and bonuses |  | 2,270 |  | 1,383
Performance bonus and operational |  | 33,106 |  | 25,392
Total |  | 35,376 |  | 26,775
Non-current |  |  |  |
Profit sharing and bonuses |  | 8,973 |  | —
Severance indemnity payments |  | 34,899 |  | 27,099
Total |  | 43,872 |  | 27,099
​
Schedule of post employment benefit obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of |  | As of |  | As of
​ | ​ | December 31, | ​ | December 31, | ​ | December 31,
Reconciliation Changes in the benefit obligation | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | ThUS$ | ​ | ThUS$ | ​ | ThUS$
Opening balance |  | 9,550 |  | 9,864 |  | 9,586
Current cost of service |  | — |  | — |  | —
Interest cost |  | 255 |  | 240 |  | 280
Actuarial gains loss |  | (1,357) |  | (135) |  | 506
Settlement | ​ | (7,739) | ​ | ​ | ​ | ​
Benefits paid |  | (430) |  | (419) |  | (508)
Total benefit obligation (A) |  | 279 |  | 9,550 |  | 9,864
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of |  | As of |  | As of
Reconciliation | ​ | December 31, | ​ | December 31, | ​ | December 31,
Changes in plan assets | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | ThUS$ | ​ | ThUS$ | ​ | ThUS$
Fair value of plan assets at the start of the year |  | 13,497 |  | 12,888 |  | 8,754
Real return (loss) in the plan assets |  | (346) |  | 1,028 |  | 4,642
Benefits paid |  | (430) |  | (419) |  | (508)
Settlement |  | (7,739) |  | — |  | —
Fair value of plan assets at the end of the year |  | 4,982 |  | 13,497 |  | 12,888
Non-current-assets |  | 4,703 |  | 3,947 |  | 3,025
Elements not yet recognized as components of the cost of periodic net pensions: |  |  |  |  |  |
Net actuarial loss at the beginning of the year |  | 1,039 |  | 192 |  | (3,634)
Amortization during the year |  | — |  | — |  | 326
Settlement | ​ | (1,627) | ​ | — | ​ | —
Gain |  | 647 |  | 847 |  | 3,500
Adjustment to recognize the minimum pension obligation |  | 59 |  | 1,039 |  | 192
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the |  | For the |  | For the
​ | ​ | year ended | ​ | year ended | ​ | year ended
Cost of service or benefits received during the year | ​ | 2022 | ​ | 2021 | ​ | 2020
​ |  | ThUS$ | ​ | ThUS$ | ​ | ThUS$
Financial cost |  | 255 |  | 240 |  | 280
Real loss in plan assets |  | (363) |  | (316) |  | (637)
Settlement |  | (1,627) |  | — |  | —
Amortization of prior year losses | ​ | — | ​ | — | ​ | 326
Net periodic pension expenses |  | (1,735) |  | (76) |  | (31)
​
Schedule of staff severance indemnities | As of December 31, 2022, and 2021, severance indemnities calculated at the actuarial value are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of |  | As of |  | As of
​ | ​ | December 31, | ​ | December 31, | ​ | December 31,
Staff severance indemnities | ​ | 2022 | ​ | 2021 | ​ | 2020
​ |  | ThUS$ |  | ThUS$ |  | ThUS$
Opening balance |  | (27,099) |  | (32,199) |  | (27,814)
Current cost of service |  | (4,204) |  | (4,978) |  | (3,804)
Interest cost |  | (1,928) |  | (1,303) |  | (1,486)
Actuarial gain loss |  | (5,305) |  | 3,999 |  | (2,826)
Exchange rate difference |  | 551 |  | 4,971 |  | (1,513)
Benefits paid during the year |  | 3,086 |  | 2,411 |  | 5,244
Total |  | (34,899) |  | (27,099) |  | (32,199)
​
Schedule of employee Actuarial assumption rate | The liability recorded for staff severance indemnity is valued at the actuarial value method, using the following actuarial assumptions:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of |  | As of |  | As of |  | ​
​ | ​ | December 31, | ​ | December 31, | ​ | December 31, | ​ | ​
Actuarial assumptions | ​ | 2022 | ​ | 2021 | ​ | 2020 | ​ | Annual/Years
Mortality rate |  | RV - 2014 |  | RV - 2014 |  | RV - 2014 |  |
Actual annual interest rate |  | 5.12 | % | 5.67 | % | 3.65 | % |
Voluntary retirement rate: |  |  |  |  |  |  |  |
Men |  | 6.49 | % | 6.49 | % | 6.49 | % | Annual
Women |  | 6.49 | % | 6.49 | % | 6.49 | % | Annual
Salary increase |  | 3.00 | % | 3.00 | % | 3.00 | % | Annual
Retirement age: |  |  |  |  |  |  |  |
Men |  | 65 |  | 65 |  | 65 |  | Years
Women |  | 60 |  | 60 |  | 60 |  | Years
​
Schedule of sensitivity analysis of assumptions | As of December 31, 2022, 2021 and 2020, the Company has conducted a sensitivity analysis of the main assumptions of the actuarial calculation, determining the following:
​ | ​ | ​ | ​ | ​
​ |  | Effect + 100 basis |  | Effect - 100 basis
Sensitivity analysis as of December 31, 2022 | ​ | points | ​ | points
​ |  | ThUS$ |  | ThUS$
Discount rate |  | (2,090) |  | 2,352
Employee turnover rate |  | (274) |  | 307
​ ​
​ | ​ | ​ | ​ | ​
​ |  | Effect + 100 basis |  | Effect - 100 basis
Sensitivity analysis as of December 31, 2021 | ​ | points | ​ | points
​ |  | ThUS$ |  | ThUS$
Discount rate |  | (1,614) |  | 1,817
Employee turnover rate |  | (212) |  | 237
​ ​
​ | ​ | ​ | ​ | ​
​ |  | Effect + 100 basis |  | Effect - 100 basis
Sensitivity analysis as of December 31, 2020 | ​ | points | ​ | points
​ |  | ThUS$ |  | ThUS$
Discount rate |  | (1,985) |  | 2,234
Employee turnover rate |  | (261) |  | 291
​

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