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| Company | Unit | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| HELLA Group | % | 9.37 | 9.97 | 9.18 | 10.1 | 9.22 |
Helgi Library 
