| Item | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Supplies | Fuel | 112,156 | 119,722 | 119,958 | 124,420 | 128,427 | 163,869 | 186,428 | 135,613 | 190,134 | 156,675 | 136,491 |
| Others | 16,370 | 21,160 | 20,886 | 18,424 | 19,147 | 21,034 | 30,178 | 21,139 | 20,618 | 22,537 | 33,259 | |
| Total | 128,526 | 140,882 | 140,844 | 142,844 | 147,574 | 184,903 | 216,606 | 156,752 | 210,752 | 179,212 | 169,750 | |
