Figure 1
Highway Vehicle¹ Trends: 1990–2000

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¹Registered vehicles.

SOURCES: 1991–1995—U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995 (Washington, DC: 1997), tables MV-201 and VM201a.
1996–1997— ____. Highway Statistics 1997 (Washington, DC: 1998), table VM-1.
1998–2000— ____. Highway Statistics 2000 (Washington, DC: 2001), table VM-1.