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	8.9	6.1	13.8	9.6	6.3	12.4	18.0	8.1	24.7	10.0	7.6	13.1
Single modes	10.3	5.1	15.1	10.3	6.2	13.1	18.3	9.0	25.3	14.3	5.5	17.2
Truck	8.5	5.9	13.2	6.4	6.3	8.8	9.3	3.2	11.5	15.4	6.9	20.1
Rail	43.2	13.8	83.3	44.1	20.4	71.9	38.1	23.6	54.9	13.4	20.8	37.0
Water	32.8	26.9	37.0	31.4	24.9	101.5	39.1	29.5	97.5	33.6	19.7	12.1
Air (including truck and air)	11.8	12.1	14.5	28.8	13.2	19.8	29.3	14.6	32.7	5.7	5.8	9.2
Pipeline	21.2	21.8	49.2	23.3	15.7	45.5	S	S	S	S	S	S
Multiple modes	9.1	11.6	16.3	33.6	21.8	29.2	37.0	15.3	49.5	6.2	5.6	9.0
Parcel, USPS or courier	10.7	15.2	23.3	10.1	18.7	26.0	11.4	28.4	40.8	6.2	5.7	9.0
Truck and rail	32.1	21.1	20.1	38.8	11.6	33.9	42.5	10.3	47.9	10.8	7.9	16.3
Other multiple modes	43.5	31.3	10.6	S	31.7	S	S	37.6	S	S	S	S
Other and unknown modes	26.2	15.6	41.8	29.0	24.5	34.8	42.4	18.0	67.0	18.5	27.0	61.6

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	27.4	7.8	24.3	40.5	16.6	44.4	S	29.7	S	27.9	21.5	83.8
Single modes	27.6	7.8	24.8	41.3	16.7	45.5	S	30.2	S	27.6	15.2	104.1
Truck	30.6	6.8	25.7	37.8	10.4	29.0	29.4	17.6	41.1	28.6	15.0	114.1
Rail	S	22.6	S	S	32.5	S	S	39.6	S	17.7	6.7	21.6
Water	35.2	43.6	42.4	39.6	43.7	69.7	48.3	43.4	112.5	25.8	21.3	35.1
Air (including truck and air)	–	S	S	–	S	S	–	S	S	–	26.2	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	46.1	S	S	48.1	S	S	S	S	S	19.4	S
Parcel, USPS or courier	S	45.8	S	S	44.2	S	S	45.1	S	S	19.3	S
Truck and rail	–	S	S	–	S	S	–	S	S	–	31.6	–
Other multiple modes	–	S	S	–	S	S	–	S	S	–	32.8	–
Other and unknown modes	S	32.7	S	S	35.8	S	S	S	S	S	S	S

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	7.9	6.5	11.4	11.4	6.6	14.3	25.2	8.2	40.4	S	10.0	S
Single modes	7.6	6.3	11.2	10.7	6.0	13.5	16.9	8.4	27.0	S	5.8	S
Truck	7.7	6.5	11.4	10.7	7.1	14.3	17.6	9.1	30.1	S	5.9	S
Rail	23.8	19.3	33.3	26.3	24.2	33.4	29.4	26.7	45.1	22.3	7.1	35.2
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	49.4	S	S	47.2	S	S	S	S	31.6	27.3	50.5
Pipeline	S	–	S	S	–	S	S	S	S	S	S	S
Multiple modes	S	19.5	S	S	20.9	S	S	29.8	S	15.4	S	S
Parcel, USPS or courier	S	44.4	S	30.9	S	S	27.7	27.5	50.6	20.0	S	S
Truck and rail	S	22.3	S	S	26.3	S	S	30.6	S	27.9	15.9	37.3
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	47.3	33.6	3.8	S	44.1	S	S	35.7	S	34.0	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	45.9	14.9	64.8	15.2	13.8	19.2	21.4	22.7	20.5	16.3	25.0	24.9
Single modes	46.3	15.2	63.8	15.7	14.1	18.5	21.6	22.8	20.0	17.8	26.1	25.3
Truck	S	15.5	S	16.8	13.8	17.4	17.5	24.5	13.6	18.3	27.2	26.4
Rail	S	S	S	S	S	S	S	S	S	30.5	26.8	39.0
Water	S	S	S	40.6	S	S	S	S	S	23.7	31.0	16.3
Air (including truck and air)	S	–	S	S	–	S	S	–	S	31.6	–	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	S	S	S	47.1	S	S	S	S	34.5	21.2	38.4
Parcel, USPS or courier	S	S	S	S	47.1	S	S	S	S	34.5	21.2	38.4
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	45.1	S	S	39.1	S	S	37.5	48.0	318.9	18.4	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	13.3	8.8	20.4	13.4	12.1	17.5	26.3	13.4	45.5	S	22.4	S
Single modes	13.9	10.8	24.3	13.9	11.4	20.5	26.4	16.5	53.3	S	14.1	S
Truck	22.3	14.2	33.4	22.4	14.8	22.7	44.2	20.2	67.6	S	14.0	S
Rail	49.5	40.3	66.7	S	28.8	S	35.9	20.9	46.0	18.2	14.5	26.5
Water	47.2	S	S	46.6	44.5	133.9	42.7	44.4	135.2	22.8	25.9	37.0
Air (including truck and air)	S	S	S	S	S	S	S	S	S	31.6	40.2	126.2
Pipeline	21.3	23.7	54.5	23.9	16.5	52.3	S	S	S	S	S	S
Multiple modes	S	29.3	S	S	32.0	S	S	37.5	S	31.8	28.9	91.7
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	32.3	20.3	61.2
Truck and rail	S	S	S	S	S	S	S	S	S	31.6	31.6	195.4
Other multiple modes	S	32.3	S	S	32.0	S	S	37.6	S	36.9	S	S
Other and unknown modes	40.6	25.0	17.2	40.4	41.2	3.3	40.6	S	S	31.1	S	S

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	7.0	6.0	10.8	23.4	29.2	44.6	20.9	20.1	42.2	8.0	11.0	14.7
Single modes	4.5	5.4	8.0	26.9	28.0	44.0	22.2	20.5	40.8	19.2	10.2	24.1
Truck	4.8	4.7	7.6	30.5	22.8	45.3	27.5	10.9	42.9	19.2	8.1	23.5
Rail	27.6	36.3	42.6	49.8	S	S	33.3	S	S	23.7	S	S
Water	–	S	S	–	S	S	–	S	S	–	31.6	–
Air (including truck and air)	45.6	17.5	141.2	27.6	25.7	29.7	36.3	37.9	24.6	13.1	8.3	13.1
Pipeline	S	S	S	S	S	S	S	S	S	S	S	S
Multiple modes	33.5	17.8	52.9	21.7	14.5	20.5	30.2	18.5	24.6	11.9	9.6	14.7
Parcel, USPS or courier	35.2	18.0	57.6	32.5	16.3	50.8	35.7	12.0	84.2	11.9	9.6	14.8
Truck and rail	S	28.8	S	38.1	20.3	23.5	42.3	20.2	26.1	21.6	5.2	23.2
Other multiple modes	S	S	S	S	S	S	S	S	S	32.2	36.4	88.7
Other and unknown modes	33.2	23.1	46.5	S	S	S	S	S	S	25.5	S	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	12.2	11.9	25.4	15.6	11.7	21.3	14.4	13.0	19.1	10.4	7.9	16.4
Single modes	10.7	13.9	24.8	12.8	11.9	18.0	14.1	13.7	19.5	25.8	10.1	46.7
Truck	10.7	13.8	25.0	13.0	12.1	18.2	15.0	13.9	20.3	27.2	11.7	55.1
Rail	17.9	S	S	26.3	S	S	26.3	S	S	17.4	28.9	51.0
Water	S	S	S	S	S	S	S	S	S	31.6	31.6	37.3
Air (including truck and air)	37.0	46.6	9.8	S	34.8	S	S	42.7	S	17.8	13.5	27.3
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	14.7	10.5	24.8	17.6	9.0	14.8	20.0	14.5	12.2	10.7	5.2	13.7
Parcel, USPS or courier	14.9	10.2	27.9	15.5	12.2	20.1	18.4	12.3	25.6	10.7	5.2	13.8
Truck and rail	S	32.5	S	S	24.9	S	47.9	21.7	10.1	25.6	7.6	15.6
Other multiple modes	–	S	S	–	S	S	–	S	S	–	32.9	–
Other and unknown modes	42.9	42.5	175.0	S	14.9	S	S	23.7	S	27.0	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	7.3	6.6	9.5	14.3	6.9	16.4	21.4	5.6	20.1	6.7	15.9	13.1
Single modes	9.0	3.1	9.6	14.4	7.1	16.8	20.4	5.1	19.7	9.0	15.3	19.3
Truck	8.9	3.2	9.5	14.9	8.1	17.9	14.7	5.0	14.8	8.6	16.9	20.2
Rail	27.1	21.4	36.5	37.6	13.6	38.2	S	16.0	S	11.8	S	S
Water	–	S	S	–	S	S	–	S	S	–	34.4	–
Air (including truck and air)	27.9	15.9	38.2	42.8	24.5	34.0	44.2	29.2	66.6	8.1	9.2	15.4
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	19.9	36.6	28.0	27.1	38.2	27.2	49.7	37.6	36.2	6.0	12.3	10.2
Parcel, USPS or courier	21.8	41.2	33.8	36.6	46.1	55.9	31.1	S	S	5.6	12.3	10.2
Truck and rail	49.9	27.7	15.7	S	30.8	S	S	36.5	S	22.6	15.1	46.9
Other multiple modes	S	S	S	S	S	S	S	S	S	29.3	33.5	54.8
Other and unknown modes	15.8	8.9	15.7	46.5	12.2	32.1	S	17.0	S	S	S	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	23.5	15.2	45.4	25.8	9.0	54.6	30.7	10.0	67.5	20.5	6.7	18.4
Single modes	27.4	16.5	54.3	27.7	8.6	59.7	33.4	11.0	77.6	33.0	7.0	30.9
Truck	21.9	17.6	44.8	22.1	9.6	47.8	23.8	9.4	54.1	37.1	7.2	41.1
Rail	S	20.5	S	S	20.3	S	S	27.1	S	14.4	11.6	18.3
Water	S	–	S	S	–	S	S	–	S	31.6	–	–
Air (including truck and air)	22.3	13.5	22.9	18.2	24.7	11.8	16.4	16.7	11.5	8.7	11.7	17.9
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	16.7	10.3	22.6	24.6	24.4	35.4	26.6	24.4	43.2	9.5	6.7	13.9
Parcel, USPS or courier	15.5	5.2	24.2	19.1	11.7	35.4	23.5	9.9	54.5	9.5	6.9	14.0
Truck and rail	44.3	31.7	26.7	35.1	32.5	37.5	33.5	29.5	46.1	19.8	17.7	28.9
Other multiple modes	S	S	S	S	S	S	S	S	S	S	36.3	S
Other and unknown modes	42.2	34.3	91.9	42.1	38.5	103.3	37.8	26.9	39.2	S	14.6	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	8.6	9.5	21.0	39.9	9.5	84.9	22.8	11.4	41.1	12.1	7.0	14.9
Single modes	9.5	10.7	24.3	40.4	9.8	87.3	24.2	11.0	40.3	29.1	12.8	15.9
Truck	9.0	11.2	24.4	18.0	9.7	33.4	13.1	11.0	23.8	31.1	15.5	20.0
Rail	S	18.0	S	S	24.9	S	S	28.5	S	S	31.7	S
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	45.4	S	S	S	47.4	S	S	45.6	S	17.9	15.6	20.4
Pipeline	–	S	S	–	S	S	S	S	S	S	S	S
Multiple modes	16.2	15.5	34.3	22.4	27.7	27.8	25.0	38.5	37.6	5.9	5.5	10.8
Parcel, USPS or courier	16.2	16.3	35.4	23.5	14.2	42.1	26.8	14.9	63.3	5.9	5.5	10.8
Truck and rail	S	37.8	S	43.5	S	S	47.6	S	S	S	16.7	S
Other multiple modes	S	–	S	S	–	S	S	–	S	31.6	–	–
Other and unknown modes	16.2	17.5	11.7	S	32.7	S	S	26.4	S	S	43.0	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	20.2	27.6	12.1	37.2	34.3	13.1	47.7	17.1	118.4	27.8	19.1	29.9
Single modes	26.7	31.0	10.2	39.1	34.5	13.1	48.9	18.0	125.3	47.0	25.9	34.8
Truck	33.3	22.2	11.5	27.6	30.9	8.8	S	15.0	S	S	21.7	S
Rail	S	S	S	S	S	S	S	S	S	28.1	S	S
Water	S	–	S	S	–	S	S	–	S	29.8	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	40.6	30.5	28.9
Pipeline	–	S	S	–	S	S	S	S	S	S	S	S
Multiple modes	S	35.3	S	S	36.0	S	S	46.9	S	28.2	19.4	34.0
Parcel, USPS or courier	S	37.2	S	S	35.3	S	S	38.1	S	28.2	19.4	34.0
Truck and rail	–	S	S	–	S	S	–	S	S	–	31.2	–
Other multiple modes	–	S	S	–	S	S	–	S	S	–	31.6	–
Other and unknown modes	S	S	S	S	45.2	S	S	S	S	S	S	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