Figure 1 - Highway Vehicle Trends: 1990-2000

Figure 1 - Highway Vehicle Trends: 1990-2000

(Index: 1990 = 1.0)

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Year Cars Motorcycles Buses Light trucks Commerical trucks
1990 1.00 1.00 1.00 1.00 1.00
1991 0.96 0.98 1.01 1.10 1.00
1992 0.95 0.95 1.03 1.18 0.98
1993 0.95 0.93 1.04 1.24 0.98
1994 0.96 0.88 1.07 1.30 1.06
1995 0.96 0.88 1.09 1.36 1.08
1996 0.97 0.91 1.11 1.43 1.13
1997 0.97 0.90 1.11 1.45 1.14
1998 0.99 0.91 1.14 1.48 1.25
1999 0.99 0.97 1.16 1.56 1.26
2000 1.00 1.02 1.19 1.64 1.29

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.