| Explanations in the notes | 2021 | 2020 | |
| 1.1.21 – 31.12.21 | 1.1.20– 31.12.20 | ||
| Net profit | 2,552 | –70,274 | |
| Depreciation of fixed assets and amortisation of intangible assets | 6) 8) | 18,213 | 82,911 |
| Profit from sale of subsidiaries | 0 | –1,170 | |
| Currency effect on sale of subsidiaries | 0 | 252 | |
| Net interest expense | 5,863 | 5,494 | |
| Other non-cash adjustments 1 | 3,922 | 2,335 | |
| Change in provisions | 14) | 6,202 | –8,107 |
| Accounting profits (losses) from sales of fixed assets | 17) | –41,299 | 5 |
| Income from associates and joint ventures | 557 | –350 | |
| Cash flow from operating activities before changes in working capital | –3,991 | 11,097 | |
| As % of net sales revenue | –1.31% | 3.62% | |
| Change in accounts receivables | 3) | –12,906 | –15,205 |
| Change in other receivables and accrued income | 3) 5) | –2,335 | –8,337 |
| Change in inventories | 4) | –2,617 | 3,899 |
| Change in trade payables | 9) | 3,775 | –5,503 |
| Change in other liabilities and deferred income | 11) 12) | 136 | 2,723 |
| Change in net current assets | –13,946 | –22,422 | |
| Cash flow from operating activities | –17,937 | –11,325 | |
| As % of net sales revenue | –5.91% | –3.70% | |
| Investments in fixed assets | –4,095 | –2,785 | |
| Divestments of fixed assets | 53,306 | 25 | |
| Investments in intangible assets | –78 | –793 | |
| Investments in/divestment of long-term financial assets | 81 | 0 | |
| Net cash flow from the purchase (-) / sale (+) of subsidiaries | 3) | 29,939 | 32,218 |
| Cash flow from investing activities | 79,152 | 28,665 | |
| Free cash flow | 61,215 | 17,339 | |
| As % of net sales revenue | 20.17% | 5.66% | |
| Change in short-term financial liabilities | 9) | 0 | –7,015 |
| Change in long-term financial liabilities | 13) | –43,000 | –7,169 |
| Change in minority interests in capital and profit | 61 | –38 | |
| Change in mandatory convertible bond | 0 | –1,195 | |
| Interest paid | –6,393 | –9,501 | |
| Cash flow from financing activities | –49,332 | –24,919 | |
| Currency translation | –9 | –210 | |
| Net change in cash and cash equivalents | 11,874 | –7,790 | |
| Cash and cash equivalents at 1 January | 12,411 | 20,201 | |
| Cash and cash equivalents at 31 December | 24,285 | 12,411 |