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 | 29.001 | -40,79 % |
| 2021 | 48.975 | 29,24 % |
| 2020 | 37.895 | -9,98 % |
| 2019 | 42.096 | -4,94 % |
| 2018 | 44.283 | -5,06 % |
| 2017 | 46.644 | 3,13 % |
| 2016 | 45.230 | 3,17 % |
| 2015 | 43.842 | -9,17 % |
| 2014 | 48.270 | 9,03 % |
| 2013 | 44.271 | -4,70 % |
| 2012 | 46.453 | -0,45 % |
| 2011 | 46.663 |