| in thousands of € | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 |
|---|---|---|---|---|---|---|---|---|---|
| Non-current interest-bearing debt | 953 581 | 968 076 | 1 184 310 | 686 665 | 1 180 347 | 1 161 310 | 792 116 | 910 074 | 688 244 |
| Value adjustments | - | - | - | - | - | - | - | 7 584 | -6 245 |
| Current interest-bearing debt | 237 742 | 641 655 | 424 184 | 942 041 | 454 401 | 297 915 | 494 714 | 441 552 | 321 907 |
| Total financial debt | 1 191 324 | 1 609 732 | 1 608 495 | 1 628 705 | 1 634 748 | 1 459 225 | 1 286 830 | 1 359 210 | 1 003 906 |
| Non-current financial receivables and cash guarantees | -10 192 | -7 451 | -6 518 | -7 332 | -6 259 | -6 664 | -9 694 | -19 551 | -21 421 |
| Current financial receivables and cash guarantees | -6 475 | -7 707 | -8 779 | -20 186 | -8 447 | -13 991 | -33 185 | -13 998 | -6 440 |
| Short-term deposits | -80 058 | -50 077 | -50 039 | -50 036 | -50 406 | -5 342 | -10 216 | -14 160 | -10 172 |
| Cash and equivalents | -677 270 | -940 416 | -566 176 | -398 273 | -418 779 | -365 546 | -401 771 | -458 542 | -391 857 |
| Net debt | 417 329 | 604 081 | 976 984 | 1 152 878 | 1 150 857 | 1 067 683 | 831 964 | 852 959 | 574 016 |
| 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | |
|---|---|---|---|---|---|---|---|---|---|
| Net debt | 604 | 977 | 1 153 | 1 151 | 1 068 | 837 | 853 | 574 | 700 |
| Ebitda | 473 | 403 | 387 | 510 | 481 | 441 | 342 | 297 | 274 |
| Net debt/U-Ebitda | 1.3 | 2.1 | 2.7 | 2.3 | 2.2 | 1.9 | 2.6 | 1.8 | 2.1 |
