PL
EN| Q1 unaudited | Q2 unaudited | Q3 unaudited | Q4 unaudited | Year ended December 31, 2016 | |
| SALES REVENUES | |||||
| Sales of merchandise and finished goods with excise tax | 7,001 | 6,400 | 6,751 | 7,393 | 27,545 |
| Excise tax | (126) | (120) | (122) | (133) | (501) |
| Revenues from sale of merchandise and finished goods, including: | 6,875 | 6,280 | 6,629 | 7,260 | 27,044 |
| Sale of electricity | 4,678 | 4,608 | 4,847 | 5,039 | 19,172 |
| Sale of distribution services | 1,433 | 1,332 | 1,365 | 1,464 | 5,594 |
| Sale of heat | 283 | 119 | 81 | 249 | 732 |
| Sale of energy origin rights | 185 | (39) | 59 | 156 | 361 |
| Regulatory system services | 137 | 113 | 123 | 140 | 513 |
| Sale of gas | 73 | 58 | 59 | 106 | 296 |
| Others sale of merchandise and materials | 86 | 89 | 95 | 106 | 376 |
| Revenues from sale of services | 128 | 130 | 137 | 133 | 528 |
| Revenues from LTC compensations | 130 | 123 | 131 | 136 | 520 |
| TOTAL SALES REVENUES | 7,133 | 6,533 | 6,897 | 7,529 | 28,092 |
| Q1 unaudited | Q2 unaudited | Q3 unaudited | Q4 unaudited | Year ended December 31, 2015 | |
| SALES REVENUES | |||||
| Sales of merchandise and finished goods with excise tax | 7,375 | 6,549 | 6,779 | 7,269 | 27,972 |
| Excise tax | (117) | (130) | (130) | (134) | (511) |
| Revenues from sale of merchandise and finished goods, including | 7,258 | 6,419 | 6,649 | 7,135 | 27,461 |
| Sale of electricity | 4,988 | 4,540 | 4,844 | 4,874 | 19,246 |
| Sale of distribution services | 1,455 | 1,358 | 1,395 | 1,475 | 5,683 |
| Sale of heat | 271 | 132 | 90 | 231 | 724 |
| Sale of energy origin rights | 207 | 122 | 56 | 215 | 600 |
| Regulatory system services | 127 | 117 | 117 | 138 | 499 |
| Sale of gas | 101 | 35 | 35 | 77 | 248 |
| Others sale of merchandise and materials | 109 | 115 | 112 | 125 | 461 |
| Revenues from sale of services | 133 | 134 | 124 | 144 | 535 |
| Revenues from LTC compensations | 162 | 139 | 142 | 103 | 546 |
| TOTAL SALES REVENUES | 7,553 | 6,692 | 6,915 | 7,382 | 28,542 |
The decrease in revenues from sale of electricity in 2016, as compared to 2015 is mainly due to lower volumes on the wholesale market and lower average selling price of electricity sold.
The decrease in revenues from sale of energy origin rights is primarily caused by decline in prices of green certficates.
Revenues from LTC compensations are described in note 33.1 of these financial statements.