| 35. | Sales |
| Details | of sales for the years ended December 31, 2015, 2016 and 2017 are as follows: |
| 2015 | 2016 | 2017 | ||||||||||||||||||||||||||
| Domestic | Overseas | Domestic | Overseas | Domestic | Overseas | |||||||||||||||||||||||
| In millions of won | ||||||||||||||||||||||||||||
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Sales of goods |
￦ | 53,961,463 | 405,573 | 54,982,095 | 397,392 | 55,373,316 | 399,232 | |||||||||||||||||||||
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Electricity |
53,229,470 | — | 54,304,529 | — | 54,649,882 | — | ||||||||||||||||||||||
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Heat supply |
204,987 | — | 181,597 | — | 205,838 | — | ||||||||||||||||||||||
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Others |
527,006 | 405,573 | 495,969 | 397,392 | 517,596 | 399,232 | ||||||||||||||||||||||
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Sales of service |
209,189 | 244,298 | 195,697 | 161,046 | 186,990 | 164,167 | ||||||||||||||||||||||
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Sales of construction services |
180,424 | 3,580,780 | 132,219 | 3,894,638 | 92,501 | 3,119,683 | ||||||||||||||||||||||
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| ￦ | 54,351,076 | 4,230,651 | 55,310,011 | 4,453,076 | 55,652,807 | 3,683,082 | ||||||||||||||||||||||
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