| 2025 | 749 million vehicle miles | 623 million vehicle miles | 54,511 million vehicle miles | 292,566 million vehicle miles |
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| 2024 | 742 million vehicle miles | 617 million vehicle miles | 53,601 million vehicle miles | 287,020 million vehicle miles |
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| 2023 | 756 million vehicle miles | 603 million vehicle miles | 52,823 million vehicle miles | 282,460 million vehicle miles |
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| 2022 | 757 million vehicle miles | 595 million vehicle miles | 51,620 million vehicle miles | 276,346 million vehicle miles |
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| 2021 | 671 million vehicle miles | 543 million vehicle miles | 46,905 million vehicle miles | 254,369 million vehicle miles |
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| 2020 | 590 million vehicle miles | 502 million vehicle miles | 42,419 million vehicle miles | 228,152 million vehicle miles |
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| 2019 | 758 million vehicle miles | 637 million vehicle miles | 54,888 million vehicle miles | 289,473 million vehicle miles |
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| 2018 | 749 million vehicle miles | 648 million vehicle miles | 54,488 million vehicle miles | 285,536 million vehicle miles |
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| 2017 | 763 million vehicle miles | 634 million vehicle miles | 54,615 million vehicle miles | 284,188 million vehicle miles |
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| 2016 | 761 million vehicle miles | 627 million vehicle miles | 54,284 million vehicle miles | 280,435 million vehicle miles |
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| 2015 | 750 million vehicle miles | 628 million vehicle miles | 53,340 million vehicle miles | 274,542 million vehicle miles |
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| 2014 | 734 million vehicle miles | 621 million vehicle miles | 51,907 million vehicle miles | 269,442 million vehicle miles |
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| 2013 | 729 million vehicle miles | 607 million vehicle miles | 50,475 million vehicle miles | 261,998 million vehicle miles |
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| 2012 | 734 million vehicle miles | 607 million vehicle miles | 50,494 million vehicle miles | 261,116 million vehicle miles |
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| 2011 | 722 million vehicle miles | 606 million vehicle miles | 50,447 million vehicle miles | 261,134 million vehicle miles |
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| 2010 | 717 million vehicle miles | 593 million vehicle miles | 50,081 million vehicle miles | 260,049 million vehicle miles |
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| 2009 | 715 million vehicle miles | 599 million vehicle miles | 50,663 million vehicle miles | 263,631 million vehicle miles |
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| 2008 | 714 million vehicle miles | 619 million vehicle miles | 51,440 million vehicle miles | 266,463 million vehicle miles |
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| 2007 | 742 million vehicle miles | 653 million vehicle miles | 52,314 million vehicle miles | 269,013 million vehicle miles |
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| 2006 | 753 million vehicle miles | 658 million vehicle miles | 52,086 million vehicle miles | 266,638 million vehicle miles |
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| 2005 | 752 million vehicle miles | 669 million vehicle miles | 51,800 million vehicle miles | 263,292 million vehicle miles |
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| 2004 | 769 million vehicle miles | 679 million vehicle miles | 52,139 million vehicle miles | 263,093 million vehicle miles |
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| 2003 | 761 million vehicle miles | 682 million vehicle miles | 51,905 million vehicle miles | 259,868 million vehicle miles |
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| 2002 | 761 million vehicle miles | 691 million vehicle miles | 52,049 million vehicle miles | 258,546 million vehicle miles |
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| 2001 | 746 million vehicle miles | 676 million vehicle miles | 51,277 million vehicle miles | 253,181 million vehicle miles |
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| 2000 | 743 million vehicle miles | 681 million vehicle miles | 50,678 million vehicle miles | 249,748 million vehicle miles |
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| 1999 | 751 million vehicle miles | 684 million vehicle miles | 50,655 million vehicle miles | 250,113 million vehicle miles |
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| 1998 | 742 million vehicle miles | 668 million vehicle miles | 49,643 million vehicle miles | 245,477 million vehicle miles |
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| 1997 | 727 million vehicle miles | 661 million vehicle miles | 48,496 million vehicle miles | 240,967 million vehicle miles |
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| 1996 | 719 million vehicle miles | 657 million vehicle miles | 47,328 million vehicle miles | 236,086 million vehicle miles |
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| 1995 | 731 million vehicle miles | 649 million vehicle miles | 45,860 million vehicle miles | 230,011 million vehicle miles |
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| 1994 | 717 million vehicle miles | 639 million vehicle miles | 44,885 million vehicle miles | 225,655 million vehicle miles |
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| 1993 | 705 million vehicle miles | 631 million vehicle miles | 43,835 million vehicle miles | 220,777 million vehicle miles |
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