Lignite is the lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steam-electric power generation. It is brownish-black and has a high inherent moisture content, sometimes as high as 45 percent The heat content of lignite ranges from 9 to 17 million Btu per ton on a moist, mineral-matter-free basis. Production data include quantities extracted from surface and underground mines, and normally exclude wastes removed at mines or associated reparation plants.
| Fecha | Valor | Cambiar , % |
|---|---|---|
| 2022 | 44.419 | -3,19 % |
| 2021 | 45.880 | 0,26 % |
| 2020 | 45.760 | -4,16 % |
| 2019 | 47.747 | -5,75 % |
| 2018 | 50.658 | -18,98 % |
| 2017 | 62.522 | -7,73 % |
| 2016 | 67.762 | -5,95 % |
| 2015 | 72.048 | 7,96 % |
| 2014 | 66.737 | -2,87 % |
| 2013 | 68.712 | -13,41 % |
| 2012 | 79.356 | 2,26 % |
| 2011 | 77.606 |