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Operating segments (Tables) | 12 Months Ended
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Dec. 31, 2019
Operating segments |
Schedule of geographic segments |
|  | 2019 |  | 2018 |  | 2017
Operating revenues: |  |  |  |  |  |  |  |  |
Domestic (Mexico) |  | Ps. | 24,594,797 |  | Ps. | 18,493,476 |  | Ps. | 17,272,946
International: |  |  |  |  |  |  |  |  |
United States of America and Central America* |  |  | 10,230,824 |  |  | 8,811,674 |  |  | 7,515,240
Non-derivative financial instruments |  |  | (72,949) |  |  | — |  |  | —
Total operating revenues |  | Ps. | 34,752,672 |  | Ps. | 27,305,150 |  | Ps. | 24,788,186
*United States of America represents approximately 29%, 31% and 29% of total revenues from external customers in 2019, 2018 and 2017, respectively.

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