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| Company | Unit | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| Ford Motor Company | % | 90.5 | -75.9 | 177 | -28.6 | 49.2 | |||||||||||||||||||||||||
| General Motors | % | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 206 | 8.06 | -93.7 | ||
| Navistar International | % | ... | -79.0 | -82.8 | -168 | 11.1 | 131 | ||||||||||||||||||||||||
| Paccar | % | ... | 6.45 | 18.7 | 15.5 | -56.1 | 142 |
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