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| Company | Unit | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 |
| Cartiera Giusta | ... | ... | ... | ... | 0.798 | 0.903 | 0.866 | 0.792 | 0.712 | |||||
| Cartiere Carrara | 0.720 | 0.727 | 0.832 | 0.787 | 0.687 | ... | ... | |||||||
| EuroVast | 1.26 | 1.21 | 1.23 | 1.26 | 1.41 |
Helgi Library 
