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| Company | Unit | 1987 | 1988 | 1989 | 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 | -5.52 | -7.82 | -4.55 | -6.72 | -30.9 | |||||||||||||||||||||||||||||
| General Motors | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | -21.0 | -7.55 | -2.47 | -2.17 | -5.01 | ||||||
| Navistar International | ... | ... | ... | -16.2 | -22.1 | -77.8 | 25.7 | -22.2 | ||||||||||||||||||||||||||
| Paccar | ... | ... | ... | 80.5 | 35.8 | 22.8 | 26.5 | 28.5 |
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