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	3.4	7.3	8.2	8.0	10.1	13.3	24.7	14.3	26.3	32.0	12.7	31.3
Single modes	3.7	8.0	9.2	14.2	11.5	18.6	26.1	14.3	26.3	43.8	13.0	30.5
Truck	5.8	10.6	13.8	13.2	13.2	22.1	13.0	13.6	26.5	38.5	11.6	30.6
Rail	11.3	7.7	9.1	22.2	15.7	26.4	27.9	15.5	27.4	5.6	7.2	9.9
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	40.6	S	S	46.4	S	S	46.3	S	S	20.1	4.4	25.2
Pipeline	S	S	S	S	S	S	S	S	S	S	S	S
Multiple modes	17.4	11.1	20.4	S	27.2	S	S	28.1	S	14.1	10.6	18.2
Parcel, USPS or courier	18.3	13.0	26.3	27.3	13.4	48.5	19.5	15.1	38.3	14.1	10.6	18.2
Truck and rail	S	16.5	S	38.7	31.0	7.8	48.7	28.9	14.1	22.7	11.1	23.4
Other multiple modes	S	S	S	S	47.0	S	S	S	S	S	27.4	S
Other and unknown modes	14.9	21.3	19.0	S	40.1	S	45.8	S	S	49.3	30.5	89.1

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	22.6	18.0	20.0	26.5	20.6	29.1	43.1	27.4	51.5	S	S	S
Single modes	22.4	21.7	25.7	26.5	23.6	41.6	43.1	30.8	63.8	S	S	S
Truck	33.3	24.3	35.8	32.3	23.9	83.6	33.0	38.5	88.5	S	S	S
Rail	44.4	34.3	41.5	45.1	29.9	44.0	S	35.0	S	15.7	13.1	31.8
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	–	S	S	–	S	S	–	S	31.6	–	–
Pipeline	S	43.5	S	S	36.8	S	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	31.6	26.4	49.3
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	31.6	30.9	69.1
Truck and rail	–	S	S	–	S	S	–	S	S	–	29.8	–
Other multiple modes	S	–	S	S	–	S	S	–	S	31.6	–	–
Other and unknown modes	S	S	S	S	S	S	S	S	S	S	47.3	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	12.0	13.6	14.9	11.9	15.9	16.4	12.4	20.2	16.9	23.4	15.7	35.3
Single modes	11.8	12.6	14.7	12.1	15.4	16.5	12.5	20.5	17.5	15.5	14.8	20.7
Truck	12.8	13.7	16.2	14.1	17.2	19.4	20.3	25.4	25.7	16.0	15.5	21.5
Rail	33.6	40.9	32.9	32.6	32.0	24.0	35.5	33.6	31.2	20.3	15.7	32.2
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	–	–	–	–	–	–	–	–	–	–	–	–
Pipeline	S	–	S	S	–	S	S	S	S	S	S	S
Multiple modes	49.0	S	S	S	S	S	S	S	S	29.7	S	S
Parcel, USPS or courier	49.0	S	S	S	S	S	S	47.4	S	29.7	38.5	485.1
Truck and rail	–	S	S	–	S	S	–	S	S	–	31.6	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	S	S	S	S	S	S	S	S	S	28.8	34.2	74.3

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	36.8	20.2	30.5	44.3	23.4	134.2	S	18.1	S	S	S	S
Single modes	40.2	23.7	33.9	44.5	24.4	142.0	S	19.6	S	S	S	S
Truck	38.9	13.4	40.5	25.8	32.5	69.3	37.1	17.9	106.1	S	S	S
Rail	34.9	37.7	8.7	S	24.3	S	S	28.8	S	21.9	13.0	33.0
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	31.6	31.6	74.5
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	42.4	S	48.1	42.1	48.3	S	46.2	S	26.8	28.7	54.9
Parcel, USPS or courier	–	S	S	–	S	S	–	S	S	–	31.6	–
Truck and rail	S	42.4	S	48.1	42.1	48.3	S	46.2	S	26.8	31.1	62.9
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	S	S	S	S	S	S	S	S	S	28.5	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	9.8	16.6	20.1	7.4	13.6	15.7	26.0	17.6	24.4	25.6	27.9	23.0
Single modes	9.8	18.2	21.9	16.0	15.2	21.4	27.8	17.6	23.9	25.7	25.6	20.0
Truck	16.1	24.8	33.5	27.3	20.2	40.8	26.3	28.1	26.4	21.7	27.9	23.0
Rail	20.2	14.3	22.8	23.4	18.5	27.9	28.5	18.2	24.6	19.6	8.9	19.3
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	–	–	–	–	–	–	–	–	–	–	–	–
Pipeline	S	S	S	S	S	S	S	S	S	S	S	S
Multiple modes	S	49.4	S	S	47.0	S	S	S	S	31.1	S	S
Parcel, USPS or courier	S	S	S	48.4	S	S	S	S	S	33.7	40.1	75.7
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	S	S	S	47.0	S	S	S	S	29.8	27.4	S
Other and unknown modes	S	42.3	S	S	42.6	S	S	21.2	S	S	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	16.3	25.3	20.0	28.5	30.8	24.3	42.5	42.2	34.3	28.0	20.7	31.8
Single modes	14.6	29.5	19.7	28.7	31.1	24.5	42.9	42.4	34.3	29.8	21.9	29.2
Truck	15.2	31.3	21.5	29.0	33.2	23.6	S	30.8	S	21.4	18.5	30.2
Rail	S	20.9	S	S	39.1	S	S	47.3	S	28.9	20.6	24.2
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	29.9	27.2	47.3
Pipeline	S	41.3	S	S	41.3	S	S	S	S	S	S	S
Multiple modes	33.8	40.4	66.7	34.9	41.6	101.5	37.1	49.8	111.1	29.7	13.2	20.4
Parcel, USPS or courier	33.9	40.4	66.7	35.3	41.6	101.3	38.7	49.8	110.0	29.6	13.2	20.3
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	–	S	S	–	S	S	–	S	31.6	–	–
Other and unknown modes	37.3	39.2	52.4	36.1	45.1	15.5	46.9	40.4	44.8	S	35.2	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	11.4	10.3	16.8	18.2	7.1	22.7	22.0	7.8	26.1	10.6	17.6	30.2
Single modes	12.5	11.0	17.1	18.0	6.5	22.6	22.2	7.7	27.0	12.3	21.5	44.5
Truck	5.5	9.2	13.5	24.5	7.3	39.6	34.5	14.2	77.1	14.2	25.6	72.4
Rail	23.6	13.6	22.6	23.5	10.9	22.9	25.6	9.2	24.8	6.0	4.7	7.7
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	28.4	26.6	27.1
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	37.2	23.5	95.2	S	49.8	S	S	44.6	S	16.7	10.4	15.1
Parcel, USPS or courier	39.6	21.6	138.5	S	22.0	S	29.8	28.1	54.2	16.7	10.3	15.1
Truck and rail	S	41.5	S	S	S	S	S	45.3	S	30.1	19.6	27.5
Other multiple modes	S	–	S	S	–	S	S	–	S	31.6	–	–
Other and unknown modes	35.4	47.0	93.2	S	S	S	S	S	S	34.8	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	13.2	14.3	14.2	26.0	26.9	24.3	33.3	13.5	25.9	S	22.9	S
Single modes	14.9	12.1	14.2	26.2	27.7	25.8	33.4	11.7	28.2	S	30.9	S
Truck	17.7	14.4	25.2	25.2	33.5	24.5	32.9	16.4	62.1	S	13.8	S
Rail	37.9	17.0	10.7	36.7	13.6	47.2	39.2	17.2	28.9	31.6	16.4	19.0
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	32.2	24.3	31.1
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	28.2	36.4	25.3	35.1	39.0	5.8	43.1	49.3	3.1	15.9	26.1	42.2
Parcel, USPS or courier	28.2	37.6	38.1	35.1	43.7	49.8	43.1	28.2	51.5	15.9	25.5	41.8
Truck and rail	–	39.4	–	–	41.3	–	–	S	S	–	27.5	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	27.4	20.1	33.0	31.4	46.8	7.9	S	S	S	41.4	45.0	66.9

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	11.9	17.0	25.8	24.7	20.7	48.8	13.1	20.5	22.9	S	26.6	S
Single modes	20.3	17.5	31.2	30.3	22.4	61.4	17.8	23.3	26.0	S	28.8	S
Truck	20.3	17.6	32.9	30.3	22.6	62.0	17.8	24.7	28.3	S	42.9	S
Rail	–	–	–	–	–	–	–	–	–	–	–	–
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	48.5	29.8	3.2	S	S	S	S	S	S	24.6	9.3	52.3
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	25.5	24.2	46.0	34.7	28.1	59.0	19.6	31.8	38.2	19.0	12.9	29.5
Parcel, USPS or courier	25.5	24.2	46.0	34.7	28.1	59.0	19.6	31.8	38.2	19.0	12.9	29.5
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	43.7	30.3	77.0	S	25.7	S	37.0	25.7	80.1	S	26.3	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	9.4	10.2	28.1	26.8	S	S	36.7	S	S	12.0	15.9	17.1
Single modes	10.5	11.5	39.7	27.2	S	S	37.8	S	S	9.1	24.3	30.9
Truck	10.4	12.9	37.0	28.4	19.6	45.6	45.3	41.0	106.9	8.1	25.1	30.9
Rail	–	S	S	–	S	S	–	S	S	–	31.6	–
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	25.5	27.0	39.5
Pipeline	S	–	S	S	–	S	S	S	S	S	S	S
Multiple modes	27.2	19.7	28.6	28.7	22.5	99.5	31.9	25.9	105.1	27.7	8.4	20.7
Parcel, USPS or courier	27.2	19.7	28.6	28.7	22.5	99.5	31.9	25.9	105.1	27.7	8.4	20.7
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	47.0	S	S	32.3	S	S	S	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	S	25.1	S	27.8	S	S	S	43.3	S	35.9	21.1	57.6
Single modes	49.5	46.6	82.7	27.9	S	S	S	S	S	23.5	S	S
Truck	49.5	37.0	100.7	27.9	S	S	S	S	S	23.5	S	S
Rail	–	S	S	–	S	S	–	S	S	–	31.6	–
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	–	S	S	–	S	S	–	S	S	–	31.6	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	47.2	S	S	S	S	S	S	S	44.6	25.1	103.0
Parcel, USPS or courier	S	47.2	S	S	S	S	S	S	S	44.6	25.1	103.0
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	S	S	S	S	S	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