Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997

Monday, July 2, 2012

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

All Commodities

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	11.9	7.3	17.5	34.5	14.3	73.6	23.4	40.0	51.9	22.9	14.2	23.3
Single modes	14.4	9.4	22.1	35.3	15.6	90.0	27.2	42.3	54.0	22.7	14.7	35.7
Truck	18.6	13.4	31.4	27.8	26.9	60.1	31.5	28.7	90.7	17.0	18.2	31.3
Rail	40.0	40.7	190.1	S	41.0	S	36.6	41.2	234.2	22.8	25.8	32.5
Water	22.8	35.8	18.8	48.7	48.8	31.7	S	S	S	35.1	21.0	18.9
Air (including truck and air)	25.6	37.1	30.2	19.5	S	S	21.0	43.0	73.6	13.4	10.3	20.3
Pipeline	44.4	32.5	167.6	43.0	33.6	142.7	S	S	S	S	S	S
Multiple modes	26.0	19.2	44.1	S	39.6	S	S	21.5	S	12.9	12.9	17.6
Parcel, USPS or courier	17.4	25.1	23.3	19.4	33.8	36.1	38.4	42.1	50.8	15.3	13.2	17.7
Truck and rail	S	S	S	S	S	S	S	S	S	31.6	30.3	217.8
Other multiple modes	32.2	39.6	111.9	S	43.4	S	S	27.6	S	10.2	32.8	79.9
Other and unknown modes	21.6	28.0	25.8	S	40.6	S	28.2	S	S	S	24.7	S

SCTG 01-05, Agriculture products and fish

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	20.6	25.2	27.3	31.8	32.4	53.0	39.0	37.2	74.9	31.4	32.4	87.9
Single modes	29.2	31.3	29.4	41.7	36.4	56.6	49.4	46.2	90.9	S	37.0	S
Truck	42.2	S	S	S	S	S	S	46.3	S	36.2	17.0	13.0
Rail	–	–	–	–	–	–	–	–	–	–	–	–
Water	28.7	49.1	30.0	S	46.9	S	S	S	S	17.5	12.1	18.0
Air (including truck and air)	33.0	27.3	127.6	30.1	26.5	121.4	30.2	36.3	123.0	16.4	16.9	44.9
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	35.6	41.6	99.4	43.6	S	S	40.0	32.7	90.3	18.0	24.7	65.8
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	25.3	22.9	61.0
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	36.6	41.7	99.5	43.9	S	S	41.3	32.8	90.3	24.8	39.9	69.2
Other and unknown modes	S	41.5	S	S	41.7	S	S	46.4	S	28.1	36.6	10.3

SCTG 06-09, Grains, alcohol, and tobacco products

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	20.4	13.4	32.7	28.7	19.9	62.1	19.7	23.8	135.1	26.6	16.4	53.2
Single modes	22.5	13.4	31.6	31.5	21.0	61.5	41.1	22.2	113.6	42.9	12.8	75.4
Truck	22.9	13.6	30.5	32.6	21.0	61.1	S	23.1	S	23.2	12.2	23.2
Rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Water	S	–	S	S	–	S	S	–	S	26.7	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	23.6	30.2	45.1
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	38.4	S	S	38.4	S	S	34.1	S	S	23.8	20.7	45.9
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	25.4	36.6	95.0
Truck and rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Other multiple modes	46.6	S	S	42.5	S	S	38.1	S	S	22.2	28.7	60.7
Other and unknown modes	49.6	47.0	88.2	S	47.1	S	S	46.6	S	S	S	S

SCTG 10-14, Stones, non-metallic minerals, and metallic ores

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	S	S	S	S	S	S	S	S	S	S	S	S
Single modes	S	S	S	S	S	S	S	S	S	S	49.8	S
Truck	S	S	S	48.9	S	S	S	S	S	37.4	46.7	9.5
Rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Water	–	S	S	–	S	S	–	S	S	–	31.6	–
Air (including truck and air)	–	S	S	–	S	S	–	S	S	–	31.6	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Parcel, USPS or courier	–	–	–	–	–	–	–	–	–	–	–	–
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	S	S	S	S	S	S	S	S	S	S	S	S

SCTG 15-19, Coal and petroleum products

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	20.6	12.7	31.5	20.5	12.6	35.3	22.9	S	S	S	18.1	S
Single modes	21.7	13.1	32.4	21.6	13.0	36.3	27.7	S	S	33.7	18.1	51.3
Truck	29.4	20.3	35.8	29.2	20.9	42.6	43.3	26.9	104.8	28.0	19.1	38.4
Rail	42.1	41.2	191.2	40.1	41.1	179.0	41.1	41.2	166.1	24.6	25.8	34.1
Water	S	S	S	S	S	S	S	S	S	S	30.3	S
Air (including truck and air)	S	S	S	S	S	S	S	S	S	31.6	30.1	46.3
Pipeline	44.4	32.5	167.5	43.0	33.6	142.7	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	25.9	30.3	743.5
Parcel, USPS or courier	S	–	S	S	–	S	S	–	S	31.6	–	–
Truck and rail	–	S	S	–	S	S	–	S	S	–	30.3	–
Other multiple modes	S	–	S	S	–	S	S	–	S	26.0	–	–
Other and unknown modes	S	34.1	S	S	35.7	S	S	39.4	S	29.9	23.1	3.3

SCTG 20-24, Pharmaceutical and chemical products

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	47.0	31.3	56.5	S	S	S	S	S	S	34.8	35.0	43.0
Single modes	S	31.2	S	S	S	S	S	S	S	39.7	17.8	70.7
Truck	S	37.1	S	S	S	S	S	S	S	S	18.0	S
Rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Water	S	S	S	S	S	S	S	S	S	29.8	S	S
Air (including truck and air)	S	39.1	S	S	48.4	S	S	46.7	S	46.1	12.8	52.3
Pipeline	S	–	S	S	–	S	S	S	S	S	S	S
Multiple modes	36.8	47.5	82.9	S	35.2	S	S	S	S	28.8	22.5	27.1
Parcel, USPS or courier	34.7	S	S	S	S	S	S	S	S	28.8	24.4	23.0
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	S	S	S	S	S	S	S	S	25.9	27.7	244.0
Other and unknown modes	S	S	S	S	S	S	S	S	S	S	48.3	S

SCTG 25-30, Logs, wood products, and textile and leather

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	14.4	20.1	16.0	S	45.2	S	S	44.2	S	44.2	20.6	21.7
Single modes	15.8	20.0	17.4	S	37.4	S	S	47.8	S	23.5	48.6	59.7
Truck	18.0	17.2	17.9	23.7	17.7	32.7	S	29.2	S	31.8	20.7	58.6
Rail	–	–	–	–	–	–	–	–	–	–	–	–
Water	S	S	S	S	S	S	S	S	S	31.6	25.9	42.5
Air (including truck and air)	47.1	41.1	20.7	49.7	S	S	S	S	S	16.9	19.9	19.1
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	31.8	38.9	16.7	S	S	S	S	S	S	30.2	9.1	18.9
Parcel, USPS or courier	31.8	39.6	17.0	S	S	S	S	S	S	30.5	9.1	19.0
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	S	S	S	S	S	S	S	S	31.8	30.5	79.8
Other and unknown modes	40.3	S	S	S	S	S	S	S	S	S	S	S

SCTG 31-34, Base metal and machinery

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	19.7	17.3	32.6	38.8	S	S	27.4	16.6	53.8	26.0	16.8	26.5
Single modes	22.7	18.1	39.9	39.1	S	S	28.6	16.5	56.3	24.7	28.3	43.6
Truck	23.4	18.6	46.2	41.3	S	S	25.8	17.4	53.4	24.8	24.7	57.5
Rail	–	–	–	–	–	–	–	–	–	–	–	–
Water	S	S	S	S	S	S	S	S	S	S	30.3	S
Air (including truck and air)	48.6	41.2	39.5	S	43.3	S	S	39.5	S	11.8	7.9	15.4
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	21.3	S	S	37.2	S	S	S	43.8	S	19.6	10.4	16.8
Parcel, USPS or courier	28.4	S	S	45.5	S	S	35.4	S	S	18.0	9.8	14.2
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	43.2	S	S	S	S	S	S	S	S	17.5	S	S
Other and unknown modes	31.1	28.4	52.5	29.2	40.6	34.8	S	S	S	S	24.1	S

SCTG 35-38, Electronic, motorized vehicles, and precision instruments

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	9.6	14.2	27.6	19.5	16.4	53.6	22.6	20.9	75.8	27.6	14.3	25.8
Single modes	10.4	11.9	25.1	21.6	17.7	56.3	26.0	22.3	96.7	32.1	20.2	33.8
Truck	12.8	14.0	29.5	20.5	17.9	47.2	16.2	31.2	63.4	17.4	29.2	43.0
Rail	–	–	–	–	–	–	–	–	–	–	–	–
Water	36.8	S	S	S	S	S	S	S	S	30.3	29.2	77.1
Air (including truck and air)	47.0	31.9	101.6	46.9	40.4	520.2	S	38.5	S	16.8	20.8	13.6
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	26.4	30.2	46.0	25.0	37.2	62.4	24.0	25.1	40.1	9.4	S	S
Parcel, USPS or courier	27.0	32.1	52.5	27.2	43.5	100.5	21.3	24.8	28.0	10.8	S	S
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	34.8	S	S	38.2	S	S	S	S	S	35.7	39.0	135.3
Other and unknown modes	36.4	36.1	188.3	31.5	S	S	S	46.7	S	S	S	S

SCTG 39-43, Furniture, mixed freight and misc manufactured products

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	S	37.2	S	S	30.6	S	44.5	S	S	29.3	18.6	15.7
Single modes	S	48.8	S	S	38.6	S	S	16.8	S	25.5	22.1	31.1
Truck	S	32.1	S	S	22.7	S	S	18.7	S	25.2	12.0	48.6
Rail	S	S	S	S	S	S	S	S	S	31.6	31.6	S
Water	S	–	S	S	–	S	S	–	S	26.8	–	–
Air (including truck and air)	S	S	S	S	33.2	S	S	32.3	S	25.6	32.2	88.4
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	45.4	23.0	39.5	S	S	S	S	S	S	22.1	11.3	16.9
Parcel, USPS or courier	34.8	22.3	13.3	S	45.8	S	S	45.5	S	23.1	11.4	16.5
Truck and rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Other multiple modes	S	S	S	S	S	S	S	S	S	25.3	26.9	38.2
Other and unknown modes	34.3	27.4	347.3	30.6	S	S	40.2	S	S	S	S	S

Commodity Unknown

Mode of transportation	Value			Tons			Ton-miles			Average miles per shipment
Mode of transportation	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002	CV 2002	CV 1997	Std. error of percent change 1997-2002
All modes	39.0	48.3	387.6	44.9	43.2	S	S	S	S	S	S	S
Single modes	49.5	43.7	382.4	45.8	44.4	S	S	S	S	36.2	S	S
Truck	49.5	43.6	385.0	45.8	44.5	S	S	S	S	36.3	S	S
Rail	–	–	–	–	–	–	–	–	–	–	–	–
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	31.9	31.6	87.1
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	28.5	31.6	154.6
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	31.6	31.6	34.3
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	–	S	S	–	S	S	–	S	28.0	–	–
Other and unknown modes	S	S	S	S	S	S	S	S	S	S	31.6	S

KEY:
– Represents data cell 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 onf 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, Individual State Data, December 2004.

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Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997