| Unit | 2018 | 2016 | 2014 | % change (2016 - 2018) | |
| Produced products | t | 141,380 | 236,179 | 233,105 | -40.14% |
| Fossil energy (total) | kWh | 200,689,266 | 222,234,170 | 217,812,922 | -9.69% |
| thereof, natural gas | kWh | 200,362,344 | 222,124,170 | 216,908,663 | –9.80% |
| thereof, heating oil | kWh | 326,922 | 110,000 | 904,259 | 197.20% |
| Electricity (total) | kWh | 43,941,728 | 47,708,177 | 46,633,511 | –7.89% |
| Fresh-water volume | m3 | 1,224,394 | 1,481,127 | 1,511,337 | –17.33% |
| Wastewater volume | m3 | 1,312,912 | 1,561,392 | 1,588,668 | –15.91% |
| Energy/output (fossil) | kWh/t | 1,419.5 | 941.0 | 934 | 50.86% |
| Energy/output (electricity) | kWh/t | 310.8 | 202.0 | 200.1 | 53.86% |
| Fresh water | m3/t 2 | 8.7 | 6.3 | 6.5 | 38.10% |
| Wastewater | m3/t 2 | 9.3 | 6.6 | 6.8 | 40.47% |
| CO2 emissions | t | 51,989 | 57,226 | 56,376 | –9.15% |
| CO2 emissions/prod. Product | kg/t | 367.7 | 242.3 | 241.8 | 51.76% |