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.
| Date | Valeur | Modifier , % |
|---|---|---|
| 2022 | 47 526 | 0,34 % |
| 2021 | 47 364 | -4,05 % |
| 2020 | 49 365 | -7,20 % |
| 2019 | 53 192 | -6,74 % |
| 2018 | 57 038 | -15,72 % |
| 2017 | 67 675 | -5,10 % |
| 2016 | 71 310 | 0,64 % |
| 2015 | 70 857 | -10,86 % |
| 2014 | 79 487 | 2,92 % |
| 2013 | 77 229 | -2,15 % |
| 2012 | 78 927 | -2,68 % |
| 2011 | 81 101 |