in € million | 2020 | 2019 | 2018 | 2017 | 2016 |
Sales | 3,520 | 3,408 | 3,154 | 2,996 | 2,903 |
EBITDA1,3 | 742 | 701 | 631 | 630 | 625 |
EBITDA margin1,3 | 21.1 | 20.6 | 20.0 | 21.0 | 21.5 |
Net income1,2,3 | 307 | 296 | 275 | 270 | 266 |
Research and development expenses1,3 | 212 | 213 | 200 | 196 | 186 |