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Accounts receivable - Net: Expected loss rate (Details) - MXN ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Expected loss rate: |  |  |
Clients | $ 1,195,559 | $ 991,033 |
Impairment provision | 191,766 | 179,639 | $ 173,398
Current |  |  |
Expected loss rate: |  |  |
Impairment provision | 1,599 | 386 |
Three months |  |  |
Expected loss rate: |  |  |
Impairment provision | 4,564 | 1,737 |
Six months |  |  |
Expected loss rate: |  |  |
Impairment provision | 979 | 36 |
One year |  |  |
Expected loss rate: |  |  |
Impairment provision | 15,856 | 11,938 |
More than 365 |  |  |
Expected loss rate: |  |  |
Impairment provision | 168,768 | 165,542 |
Mexico |  |  |
Expected loss rate: |  |  |
Clients | 131,801 | 131,248 |
Impairment provision | 128,930 | $ 129,299 |
Mexico | Current |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 0.02% |
Clients |  | $ 93 |
Mexico | Three months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 0.02% |
Clients | 1,012 | $ 604 |
Mexico | Six months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 0.02% |
Clients | 1,733 | $ 1,252 |
Mexico | One year |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 100.00% |
Clients | 126 | $ 495 |
Impairment provision |  | $ 495 |
Mexico | More than 365 |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 100.00% |
Clients | 128,930 | $ 128,804 |
Impairment provision | 128,930 | 128,804 |
Puerto Rico (Aerostar) |  |  |
Expected loss rate: |  |  |
Clients | 291,617 | 246,647 |
Impairment provision | 37,489 | $ 43,074 |
Puerto Rico (Aerostar) | Current |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 1.00% |
Clients | 159,796 | $ 154,235 |
Impairment provision | 1,599 | 386 |
Puerto Rico (Aerostar) | Three months |  |  |
Expected loss rate: |  |  |
Clients | 97,697 | 49,645 |
Impairment provision | 3,611 | $ 124 |
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 |  | 15.00% |
Clients | 2,176 | $ 239 |
Impairment provision | 544 | $ 36 |
Puerto Rico (Aerostar) | One year |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 50.00% |
Clients | 712 | $ 5,790 |
Impairment provision | 499 | $ 5,790 |
Puerto Rico (Aerostar) | More than 365 |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 100.00% |
Clients | 31,236 | $ 36,738 |
Impairment provision | 31,236 | 36,738 |
Colombia (Airplan) |  |  |
Expected loss rate: |  |  |
Clients | 191,227 | 188,876 |
Impairment provision | 25,347 | $ 7,266 |
Colombia (Airplan) | Current |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 0.83% |
Colombia (Airplan) | Three months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 0.83% |
Clients | 114,858 | $ 183,223 |
Impairment provision | 953 | $ 1,613 |
Colombia (Airplan) | Six months |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 0.83% |
Clients | 52,410 |  |
Impairment provision | 435 |  |
Colombia (Airplan) | One year |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 100.00% |
Clients | 15,357 | $ 5,653 |
Impairment provision | 15,357 | $ 5,653 |
Colombia (Airplan) | More than 365 |  |  |
Expected loss rate: |  |  |
Expected credit loss rate |  | 100.00% |
Clients | 8,602 |  |
Impairment provision | $ 8,602 |  |

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