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| Company | Unit |
| HELLA Group | |
| Kontron | |
| VEKA |
| 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 |
| 2.27 | 1.86 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ||||||||||||
| ... | ... | ... | ... | 1.59 | 1.51 | 1.53 | 1.43 | 1.86 | ||||||||||||||||
| ... | ... | ... | ... | 2.84 | 1.80 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
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