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| Company | Unit | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| Ashok Leyland | % | ... | ... | ... | ... | ... | ... | ... | 11.7 | 10.0 | 8.05 | 8.09 | 7.72 | |||||||
| Tata Motors | % | 9.46 | 9.88 | 10.8 | 10.7 | 10.5 |
Helgi Library 
