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| Company | Unit | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| Ford Motor Company | % | -0.949 | 1.00 | 2.98 | ... | ... | ... | ... | ... | ... | ||||||||||||||||||||
| General Motors | % | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 2.75 | ... | ... | ... | ... | ... | ... |
| Navistar International | % | -3.12 | -3.08 | -0.680 | -4.68 | -4.55 | ... | ... | ||||||||||||||||||||||
| Paccar | % | 2.48 | 4.61 | 12.2 | 4.50 | 1.58 |
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