Average miles per shipmen t- Std. error of percent change
2002
1997
2002
1997
2002
1997
2002
1997
Total
3.0
3.4
5.7
4.2
2.8
6.2
4.4
5.5
7.8
7.1
7.6
12.9
17
Gasoline and aviation turbine fuel
3.6
3.8
6.7
3.8
3.5
6.3
10.4
15.0
21.0
12.2
5.6
15.3
18
Fuel oils
8.1
4.3
11.4
8.1
5.4
11.3
9.5
15.1
20.4
7.6
5.7
10.6
19
Coal and petroleum products, n.e.c.
11.7
9.1
19.4
12.6
8.7
19.4
13.7
12.1
25.3
19.9
7.9
25.8
20
Basic chemicals
11.1
13.9
17.9
19.6
7.7
28.0
11.9
14.7
16.4
13.6
20.9
45.2
22
Fertilizers
23.5
14.6
29.6
21.8
14.8
28.6
16.1
11.8
17.0
35.2
11.8
41.1
23
Chemical products and preparations, n.e.c.
16.1
4.4
23.9
11.1
10.4
26.8
12.7
7.5
24.4
18.0
9.2
32.6
–
All other SCTG codes
7.7
12.5
20.4
19.5
7.2
29.4
13.1
6.2
20.4
11.4
15.2
13.6
KEY:
– Represents an estimate equal to zero or less than 1
unit of measure.
S Estimate does not meet publication standards because of highly sampling
variability or poor response quality.
CV Coefficient of variation of number
NOTE: The Introduction and appendixes give
information on confidentiality protection, sampling error, nonsampling error,
sample design, and definitions. Links to this information on the Internet may
be found at www.census.gov/cfs.
SOURCE: Bureau of Transportation
Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat
Data, December 2004.
