Table B–7b. Estimated Measures of Reliability for Export Shipment
Characteristics by Commodity Group and Export Mode: 2002 and 1997
[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]
Excel | CSV
All Commodities
All modes |
4.9 |
3.8 |
6.6 |
11.8 |
7.3 |
15.2 |
Single modes |
4.1 |
4.7 |
6.5 |
12.4 |
7.9 |
16.3 |
Truck |
6.4 |
13.1 |
19.9 |
6.5 |
8.4 |
12.1 |
Rail |
8.9 |
37.7 |
29.8 |
16.2 |
30.4 |
46.9 |
Water |
6.2 |
6.4 |
9.0 |
15.9 |
7.6 |
18.8 |
Air (including truck and air) |
7.5 |
9.0 |
10.8 |
11.2 |
7.8 |
11.4 |
Pipeline |
S |
35.4 |
S |
S |
34.0 |
S |
Multiple modes |
18.2 |
8.3 |
92.0 |
14.7 |
27.7 |
883.0 |
Parcel, U.S.P.S. or courier |
11.0 |
8.3 |
21.6 |
31.4 |
27.7 |
28.4 |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
27.7 |
– |
– |
15.2 |
– |
– |
Other and unknown modes |
13.8 |
6.8 |
4.5 |
28.6 |
24.6 |
11.4 |
SCTG 01-05, Agriculture products and fish
All modes |
14.1 |
8.1 |
18.0 |
17.4 |
12.2 |
30.0 |
Single modes |
13.9 |
8.1 |
18.5 |
17.7 |
12.4 |
32.6 |
Truck |
25.8 |
9.4 |
46.8 |
19.1 |
13.3 |
37.9 |
Rail |
28.9 |
20.8 |
75.7 |
26.4 |
23.7 |
121.8 |
Water |
16.5 |
8.9 |
20.1 |
19.0 |
12.6 |
33.0 |
Air (including truck and air) |
S |
26.3 |
S |
S |
22.5 |
S |
Pipeline |
– |
S |
S |
– |
S |
S |
Multiple modes |
25.3 |
37.0 |
S |
38.7 |
36.7 |
S |
Parcel, U.S.P.S. or courier |
S |
37.0 |
S |
S |
36.7 |
S |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
26.1 |
– |
– |
38.7 |
– |
– |
Other and unknown modes |
27.5 |
37.6 |
10.5 |
46.7 |
S |
S |
SCTG 06-09, Grains, alcohol, and tobacco products
All modes |
18.3 |
5.9 |
21.7 |
13.8 |
10.6 |
16.8 |
Single modes |
19.8 |
6.8 |
24.8 |
14.0 |
12.4 |
18.9 |
Truck |
14.2 |
8.1 |
22.7 |
21.0 |
8.6 |
34.8 |
Rail |
23.4 |
10.9 |
43.8 |
16.7 |
12.1 |
28.5 |
Water |
25.4 |
11.1 |
30.1 |
16.5 |
18.1 |
18.8 |
Air (including truck and air) |
S |
23.6 |
S |
S |
29.0 |
S |
Pipeline |
S |
– |
S |
S |
– |
S |
Multiple modes |
32.1 |
S |
S |
23.9 |
46.1 |
S |
Parcel, U.S.P.S. or courier |
28.0 |
S |
S |
S |
46.1 |
S |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
32.8 |
– |
– |
23.7 |
– |
– |
Other and unknown modes |
30.2 |
17.2 |
5.0 |
29.8 |
17.4 |
5.3 |
SCTG 10-14, Stones, nonmetallic minerals, and metallic ores
All modes |
16.9 |
14.2 |
25.9 |
23.9 |
13.2 |
48.1 |
Single modes |
13.8 |
14.2 |
19.1 |
23.9 |
13.9 |
46.0 |
Truck |
23.6 |
18.5 |
36.7 |
23.5 |
20.8 |
47.7 |
Rail |
22.6 |
34.0 |
54.5 |
35.3 |
30.7 |
86.6 |
Water |
18.3 |
21.5 |
28.5 |
31.6 |
29.5 |
67.7 |
Air (including truck and air) |
S |
S |
S |
44.7 |
43.7 |
9.1 |
Pipeline |
– |
– |
– |
– |
– |
– |
Multiple modes |
S |
S |
S |
39.8 |
S |
S |
Parcel, U.S.P.S. or courier |
S |
S |
S |
S |
S |
S |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
S |
– |
S |
39.8 |
– |
– |
Other and unknown modes |
41.1 |
23.5 |
7.0 |
42.4 |
16.1 |
8.1 |
SCTG 15-19, Coal and petroleum products
All modes |
31.2 |
13.5 |
30.1 |
24.2 |
7.5 |
16.4 |
Single modes |
32.7 |
14.9 |
31.8 |
24.4 |
8.3 |
16.2 |
Truck |
45.2 |
40.9 |
45.4 |
S |
S |
S |
Rail |
31.7 |
38.9 |
30.2 |
38.5 |
42.2 |
34.1 |
Water |
37.6 |
17.9 |
39.2 |
28.4 |
9.2 |
19.2 |
Air (including truck and air) |
S |
44.1 |
S |
S |
S |
S |
Pipeline |
S |
S |
S |
S |
S |
S |
Multiple modes |
S |
43.1 |
S |
S |
S |
S |
Parcel, U.S.P.S. or courier |
S |
43.1 |
S |
S |
S |
S |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
S |
– |
S |
S |
– |
S |
Other and unknown modes |
47.1 |
30.5 |
5.7 |
S |
42.9 |
S |
SCTG 20-24, Pharmaceutical and chemical products
All modes |
7.2 |
23.0 |
23.3 |
23.2 |
37.2 |
48.1 |
Single modes |
7.3 |
25.3 |
25.7 |
23.9 |
39.1 |
50.4 |
Truck |
11.6 |
15.4 |
23.9 |
16.7 |
28.8 |
42.9 |
Rail |
28.5 |
S |
S |
38.3 |
S |
S |
Water |
8.2 |
25.1 |
25.8 |
40.8 |
25.0 |
50.0 |
Air (including truck and air) |
11.9 |
14.4 |
22.7 |
19.1 |
17.8 |
29.1 |
Pipeline |
S |
S |
S |
S |
S |
S |
Multiple modes |
16.0 |
14.7 |
154.3 |
18.8 |
26.1 |
S |
Parcel, U.S.P.S. or courier |
9.8 |
14.7 |
13.0 |
36.0 |
26.1 |
26.3 |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
18.2 |
– |
– |
19.0 |
– |
– |
Other and unknown modes |
24.2 |
11.3 |
5.0 |
23.1 |
14.3 |
5.2 |
SCTG 25-30, Logs, wood products, and textile and leather
All modes |
7.3 |
3.4 |
8.2 |
11.0 |
17.5 |
17.2 |
Single modes |
8.1 |
2.7 |
8.7 |
10.5 |
18.8 |
16.3 |
Truck |
8.1 |
6.8 |
12.9 |
8.6 |
10.2 |
14.2 |
Rail |
S |
17.7 |
S |
40.6 |
14.2 |
121.8 |
Water |
15.4 |
5.0 |
15.8 |
16.1 |
23.0 |
18.4 |
Air (including truck and air) |
27.2 |
13.3 |
20.4 |
15.8 |
24.1 |
11.4 |
Pipeline |
S |
S |
S |
S |
S |
S |
Multiple modes |
22.5 |
32.9 |
209.8 |
37.6 |
34.4 |
S |
Parcel, U.S.P.S. or courier |
20.7 |
32.9 |
38.4 |
28.2 |
34.4 |
41.2 |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
26.9 |
– |
– |
38.0 |
– |
– |
Other and unknown modes |
20.9 |
16.8 |
3.7 |
15.0 |
13.6 |
3.6 |
SCTG 31-34, Base metal and machinery
All modes |
7.0 |
3.5 |
8.4 |
12.4 |
12.4 |
23.3 |
Single modes |
7.3 |
4.2 |
8.8 |
13.2 |
14.0 |
22.9 |
Truck |
9.9 |
3.8 |
15.5 |
10.9 |
7.5 |
17.5 |
Rail |
25.0 |
34.2 |
34.9 |
21.3 |
28.2 |
30.5 |
Water |
17.5 |
7.0 |
14.0 |
27.7 |
31.0 |
54.8 |
Air (including truck and air) |
12.2 |
6.2 |
12.8 |
17.7 |
17.3 |
8.9 |
Pipeline |
S |
S |
S |
S |
S |
S |
Multiple modes |
10.7 |
13.0 |
71.8 |
26.4 |
40.5 |
474.0 |
Parcel, U.S.P.S. or courier |
15.4 |
13.0 |
31.4 |
33.5 |
40.5 |
21.3 |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
15.2 |
– |
– |
27.4 |
– |
– |
Other and unknown modes |
31.4 |
9.6 |
21.2 |
S |
10.2 |
S |
SCTG 35-38, Electronic, motorized vehicles, and precision instruments
All modes |
8.5 |
7.2 |
12.4 |
10.1 |
3.8 |
14.0 |
Single modes |
7.6 |
7.7 |
11.6 |
11.3 |
4.4 |
16.2 |
Truck |
16.5 |
26.9 |
44.7 |
13.3 |
7.6 |
25.0 |
Rail |
22.2 |
17.2 |
30.6 |
13.2 |
12.3 |
16.5 |
Water |
12.6 |
7.5 |
16.2 |
18.1 |
7.5 |
20.9 |
Air (including truck and air) |
9.6 |
12.4 |
14.7 |
11.4 |
16.2 |
16.7 |
Pipeline |
S |
S |
S |
S |
S |
S |
Multiple modes |
32.1 |
11.7 |
141.6 |
19.0 |
27.6 |
345.8 |
Parcel, U.S.P.S. or courier |
7.5 |
11.7 |
22.4 |
15.7 |
27.6 |
40.4 |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
S |
– |
S |
22.1 |
– |
– |
Other and unknown modes |
36.4 |
10.4 |
9.7 |
33.2 |
8.2 |
13.6 |
SCTG 39-43, Furniture, mixed freight and misc. manufactured products
All modes |
8.2 |
8.7 |
13.6 |
15.4 |
8.2 |
11.1 |
Single modes |
9.6 |
10.1 |
14.7 |
16.7 |
9.3 |
12.0 |
Truck |
11.3 |
9.9 |
17.4 |
15.7 |
26.0 |
17.8 |
Rail |
33.2 |
37.4 |
12.9 |
36.0 |
31.9 |
13.2 |
Water |
15.7 |
11.4 |
26.0 |
21.2 |
20.5 |
20.4 |
Air (including truck and air) |
17.3 |
17.1 |
17.6 |
16.7 |
12.4 |
22.1 |
Pipeline |
S |
S |
S |
S |
S |
S |
Multiple modes |
28.7 |
14.0 |
139.4 |
29.4 |
S |
S |
Parcel, U.S.P.S. or courier |
S |
14.0 |
S |
16.3 |
S |
S |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
21.2 |
– |
– |
30.2 |
– |
– |
Other and unknown modes |
37.7 |
7.9 |
12.6 |
39.1 |
20.8 |
3.9 |
Commodity unknown
All modes |
32.1 |
28.5 |
15.0 |
S |
44.7 |
S |
Single modes |
21.1 |
27.7 |
9.7 |
S |
31.3 |
S |
Truck |
37.9 |
19.9 |
25.2 |
S |
33.1 |
S |
Rail |
S |
S |
S |
S |
42.5 |
S |
Water |
44.7 |
24.8 |
25.7 |
S |
45.5 |
S |
Air (including truck and air) |
41.4 |
41.5 |
10.6 |
S |
29.2 |
S |
Pipeline |
– |
– |
– |
– |
– |
– |
Multiple modes |
S |
S |
S |
S |
S |
S |
Parcel, U.S.P.S. or courier |
S |
S |
S |
S |
S |
S |
Truck and rail |
– |
– |
– |
– |
– |
– |
All other multiple modes |
S |
– |
S |
S |
– |
S |
Other and unknown modes |
S |
S |
S |
S |
S |
S |
KEY:
– Represents an estimate equal to zero or less than 1 unit of
measure.
S Estimate does not meet publication standards because of high 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: Research and Innovative Technologies
Administration, Bureau of Transportation Statistics (USDOT) and U.S. Census
Bureau, 2002 Commodity Flow Survey, Export Data, March 2005.
Find this web page at:
http://www.bts.gov/publications/commodity_flow_survey/2002/exports/html/table_b_07b.html
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