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Accounts receivable - Net: Expected loss rate (Details) - MXN ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Expected loss rate: |  |  |
Accounts receivables | $ 1,458,653 | $ 1,195,559 |
Impairment provision | 346,183 | 191,766 | $ 179,639
Mexico |  |  |
Expected loss rate: |  |  |
Accounts receivables | 65,452 |  |
Impairment provision | $ 199,400 | $ 128,930 |
Mexico | Current |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 0.00% | 0.02% |
Accounts receivables | $ 474,854 |  |
Mexico | Three months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 0.02% | 0.02% |
Accounts receivables | $ 59,819 | $ 1,012 |
Impairment provision | $ 784 |  |
Mexico | Six months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 19.20% | 0.02% |
Accounts receivables | $ 14,292 | $ 1,733 |
Impairment provision | $ 2,744 |  |
Mexico | One year |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 100.00% | 100.00% |
Accounts receivables | $ 66,816 | $ 126 |
Impairment provision | $ 66,816 |  |
Mexico | More than 365 |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 100.00% | 100.00% |
Accounts receivables | $ 129,056 | $ 128,930 |
Impairment provision | 129,056 | 128,930 |
Puerto Rico (Aerostar) |  |  |
Expected loss rate: |  |  |
Impairment provision | $ 88,331 | $ 37,489 |
Puerto Rico (Aerostar) | Current |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 5.40% | 1.00% |
Accounts receivables | $ 444,515 | $ 159,796 |
Impairment provision | $ 23,984 | 1,599 |
Puerto Rico (Aerostar) | Three months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 5.10% |  |
Accounts receivables | $ 60,421 | 97,697 |
Impairment provision | $ 3,084 | $ 3,611 |
Puerto Rico (Aerostar) | Three months | Minimum |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 2.50% |
Puerto Rico (Aerostar) | Three months | Maximum |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 5.00% |
Puerto Rico (Aerostar) | Six months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 43.70% | 15.00% |
Accounts receivables | $ 3,702 | $ 2,176 |
Impairment provision | $ 1,619 | $ 544 |
Puerto Rico (Aerostar) | One year |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 88.00% | 50.00% |
Accounts receivables | $ 4,896 | $ 712 |
Impairment provision | $ 4,284 | $ 499 |
Puerto Rico (Aerostar) | More than 365 |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 100.00% | 100.00% |
Accounts receivables | $ 55,360 | $ 31,236 |
Impairment provision | 55,360 | 31,236 |
Colombia (Airplan) |  |  |
Expected loss rate: |  |  |
Impairment provision | $ 58,452 | $ 25,347 |
Colombia (Airplan) | Current |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 0.83% | 0.83% |
Colombia (Airplan) | Three months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 0.70% | 0.83% |
Accounts receivables | $ 73,865 | $ 114,858 |
Impairment provision | $ 516 | $ 953 |
Colombia (Airplan) | Six months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 0.83% | 0.83% |
Accounts receivables | $ 1,610 | $ 52,410 |
Impairment provision | $ 110 | $ 435 |
Colombia (Airplan) | One year |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 100.00% | 100.00% |
Accounts receivables | $ 37,214 | $ 15,357 |
Impairment provision | $ 25,593 | $ 15,357 |
Colombia (Airplan) | More than 365 |  |  |
Expected loss rate: |  |  |
Expected credit loss rate | 100.00% | 100.00% |
Accounts receivables | $ 32,233 | $ 8,602 |
Impairment provision | $ 32,233 | $ 8,602 |

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