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	5.9	4.3	7.7	13.6	3.9	15.0	39.2	8.9	76.1	15.7	16.5	28.1
Single modes	6.7	5.3	9.0	13.9	4.0	14.8	40.4	8.7	80.6	25.2	11.9	38.3
Truck	7.1	5.9	9.4	11.7	5.3	11.8	12.5	5.8	17.4	24.2	10.6	35.5
Rail	23.5	9.7	30.0	49.2	15.1	76.9	S	19.7	S	4.1	4.2	6.1
Water	16.8	27.6	36.4	18.7	31.9	52.7	19.1	32.6	52.6	11.1	10.9	16.7
Air (including truck and air)	S	26.8	S	S	39.6	S	S	47.7	S	8.4	8.7	15.6
Pipeline	S	S	S	S	S	S	S	S	S	S	S	S
Multiple modes	18.3	13.7	22.9	35.7	43.8	41.0	40.0	S	S	6.9	8.1	12.7
Parcel, USPS or courier	15.5	14.1	19.5	16.6	16.9	23.6	21.2	20.1	38.2	6.9	8.2	12.7
Truck and rail	S	28.0	S	41.0	26.6	16.8	41.5	30.2	18.6	14.3	13.2	18.7
Other multiple modes	48.4	S	S	S	S	S	S	S	S	32.4	S	S
Other and unknown modes	33.4	17.9	40.5	S	17.5	S	S	33.6	S	S	40.8	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	25.6	11.2	21.3	29.8	9.5	34.8	S	17.0	S	22.8	24.4	85.5
Single modes	24.4	11.5	19.6	29.7	9.5	31.9	S	18.2	S	29.1	18.0	52.6
Truck	28.5	13.4	20.6	29.9	12.6	22.8	33.6	5.3	32.2	28.8	18.4	52.2
Rail	S	26.3	S	S	32.6	S	S	42.1	S	3.3	12.5	14.6
Water	16.7	27.7	38.8	18.2	31.7	57.4	18.7	32.2	56.7	11.1	10.7	15.3
Air (including truck and air)	S	S	S	S	S	S	S	S	S	36.1	31.6	12.8
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	48.5	S	S	S	S	S	S	S	19.7	15.7	35.8
Parcel, USPS or courier	S	48.9	S	S	26.0	S	S	35.2	S	19.3	19.1	39.6
Truck and rail	S	37.0	S	S	47.3	S	S	S	S	27.3	20.1	21.5
Other multiple modes	S	S	S	S	S	S	S	S	S	26.2	27.9	40.1
Other and unknown modes	S	30.5	S	S	30.6	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	25.6	15.5	29.5	29.9	6.7	37.1	25.6	11.6	29.2	21.4	7.9	92.7
Single modes	26.0	14.9	29.0	27.9	6.5	31.9	25.6	11.0	29.5	20.5	7.7	36.4
Truck	29.1	18.6	34.0	36.3	7.7	42.7	42.8	10.6	58.3	24.9	9.9	42.6
Rail	20.0	13.3	22.5	19.1	10.3	24.6	19.3	14.5	24.5	4.4	7.1	7.5
Water	–	S	S	–	S	S	–	S	S	–	31.6	–
Air (including truck and air)	S	S	S	S	S	S	S	S	S	31.6	24.9	36.4
Pipeline	S	–	S	S	–	S	S	S	S	S	S	S
Multiple modes	S	S	S	S	49.4	S	S	S	S	27.4	S	S
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	26.7	35.3	135.6
Truck and rail	S	S	S	S	S	S	S	S	S	31.6	26.1	38.8
Other multiple modes	S	S	S	S	S	S	S	S	S	31.6	31.6	80.9
Other and unknown modes	S	45.4	S	S	45.5	S	S	49.2	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	27.6	S	S	26.2	20.9	34.5	S	40.2	S	20.5	38.6	47.7
Single modes	27.8	S	S	26.5	21.0	34.7	S	42.0	S	19.0	38.8	45.6
Truck	28.4	S	S	26.7	21.0	35.2	S	45.6	S	19.0	39.6	46.6
Rail	S	39.1	S	S	40.5	S	S	41.5	S	23.9	28.7	56.6
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	–	–	–	–	–	–	–	–	–	–	–	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	31.6	29.7	65.1
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	31.6	34.9	313.6
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	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	28.7	19.2	33.3	26.6	22.7	27.6	44.2	21.5	93.9	S	25.9	S
Single modes	28.8	19.3	33.3	26.6	22.8	27.7	44.3	21.9	95.6	S	22.7	S
Truck	27.7	20.3	30.8	26.8	23.8	27.6	45.3	25.8	115.6	S	23.3	S
Rail	–	S	S	–	S	S	–	S	S	–	30.9	–
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	–	S	S	–	S	S	–	S	31.6	–	–
Pipeline	S	S	S	S	S	S	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	35.6	S	S
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	37.8	S	S
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	S	S	S	S	S	S	S	S	31.6	31.6	S
Other and unknown modes	S	34.5	S	S	S	S	S	S	S	32.7	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	15.2	14.6	29.0	25.7	12.7	74.7	26.7	16.9	69.4	21.3	15.3	41.7
Single modes	15.4	15.6	29.6	25.9	13.0	76.4	26.4	17.1	68.2	26.8	26.9	83.8
Truck	17.0	14.7	28.8	27.1	15.1	83.9	22.1	17.5	58.4	19.4	28.1	76.1
Rail	38.7	35.0	125.7	S	19.1	S	44.3	21.4	116.2	19.3	7.3	22.1
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	38.3	S	S	44.0	S	S	38.3	S	16.4	18.1	25.9
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	41.1	18.5	90.5	49.7	30.7	131.3	S	30.2	S	9.3	13.5	24.0
Parcel, USPS or courier	21.1	18.1	25.7	25.0	25.2	39.2	28.2	18.7	53.5	9.2	13.9	24.5
Truck and rail	S	38.4	S	S	41.3	S	S	40.6	S	15.2	17.8	20.6
Other multiple modes	S	S	S	S	S	S	S	S	S	29.8	31.6	85.6
Other and unknown modes	25.8	42.0	28.6	35.4	34.5	27.4	45.6	28.7	149.8	S	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	27.3	4.8	34.2	36.4	13.1	55.7	41.2	15.5	78.6	12.5	15.1	21.3
Single modes	30.5	7.6	41.1	36.7	13.5	57.9	42.2	16.1	82.4	32.8	21.6	47.8
Truck	30.2	7.7	39.0	35.9	13.0	54.0	41.5	15.2	73.0	39.1	22.6	51.2
Rail	S	S	S	S	S	S	S	S	S	24.5	30.0	50.1
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	38.2	24.9	76.0	37.9	23.7	41.3	39.8	26.3	47.2	15.0	10.3	31.0
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	37.1	20.2	37.6	S	10.1	S	S	13.6	S	6.6	8.9	10.6
Parcel, USPS or courier	37.1	20.5	38.0	S	11.0	S	S	14.2	S	6.6	8.9	10.6
Truck and rail	–	S	S	–	S	S	–	S	S	–	26.4	–
Other multiple modes	S	S	S	S	S	S	S	S	S	31.6	31.6	0.4
Other and unknown modes	S	27.7	S	S	S	S	S	32.6	S	34.4	48.2	33.9

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	8.7	10.8	15.5	15.4	10.4	11.9	13.5	7.4	16.7	21.1	18.2	34.8
Single modes	8.6	11.5	17.4	16.0	10.7	11.8	13.4	7.2	17.9	24.2	37.6	96.5
Truck	8.8	11.5	17.4	17.2	11.8	11.9	13.2	6.0	15.9	24.5	33.7	87.9
Rail	23.6	33.4	57.3	20.2	23.3	40.9	24.9	22.4	52.6	20.0	18.1	23.1
Water	–	S	S	–	S	S	–	S	S	–	31.6	–
Air (including truck and air)	S	42.9	S	S	37.9	S	S	39.0	S	7.3	8.1	11.0
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	14.0	21.6	6.9	21.8	39.8	5.3	32.5	S	S	15.0	14.1	24.6
Parcel, USPS or courier	13.4	19.0	6.4	15.9	26.0	7.9	20.9	38.0	12.1	15.2	14.1	24.7
Truck and rail	42.7	43.9	8.5	45.0	S	S	46.2	S	S	24.0	20.8	53.0
Other multiple modes	S	S	S	S	S	S	S	S	S	28.9	30.7	46.1
Other and unknown modes	42.6	23.7	75.4	S	29.2	S	S	26.7	S	49.8	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	14.2	14.4	20.5	23.5	11.7	26.0	25.6	14.8	33.7	9.1	22.0	37.7
Single modes	13.1	13.6	21.2	25.1	11.1	29.1	27.5	12.8	36.9	29.3	43.9	235.4
Truck	14.1	14.0	19.6	26.2	12.2	31.0	29.2	14.4	40.4	31.5	47.5	205.6
Rail	44.8	44.8	14.0	44.2	29.8	47.9	45.5	27.3	52.6	26.5	22.5	25.9
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	46.5	S	S	S	S	S	S	S	10.3	23.1	41.6
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	20.6	25.1	24.5	22.9	29.2	27.9	27.6	30.9	47.6	12.1	10.6	15.5
Parcel, USPS or courier	21.9	25.4	23.9	28.9	30.6	16.0	31.0	34.3	26.5	12.1	10.6	15.5
Truck and rail	S	S	S	44.5	S	S	47.5	S	S	26.3	29.8	24.4
Other multiple modes	S	–	S	S	–	S	S	–	S	30.4	–	–
Other and unknown modes	S	34.9	S	S	32.0	S	43.9	45.9	17.0	S	33.0	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	11.7	22.8	39.0	7.0	25.1	19.6	10.7	13.0	15.9	41.7	9.5	23.9
Single modes	10.2	24.8	38.1	7.2	24.4	18.9	10.9	12.8	15.5	S	13.0	S
Truck	10.1	25.5	39.8	7.1	29.6	27.8	10.7	15.4	21.8	S	12.7	S
Rail	S	25.7	S	S	27.2	S	S	18.3	S	31.6	31.3	49.0
Water	–	–	–	–	–	–	–	–	–	–	–	–
Air (including truck and air)	S	36.5	S	S	29.7	S	S	36.4	S	20.5	15.4	41.3
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	47.0	17.3	126.1	39.9	S	S	38.3	28.0	76.9	9.4	3.3	9.1
Parcel, USPS or courier	46.9	17.8	127.9	40.0	15.3	122.8	38.1	13.4	103.5	9.4	3.3	9.1
Truck and rail	S	S	S	S	S	S	S	S	S	31.6	S	S
Other multiple modes	S	S	S	S	S	S	S	S	S	31.6	31.6	24.6
Other and unknown modes	S	30.5	S	S	45.7	S	S	43.9	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	40.1	43.5	20.8	40.1	S	S	S	S	S	27.0	33.0	164.4
Single modes	41.1	48.2	24.4	41.8	S	S	S	S	S	35.9	S	S
Truck	33.6	33.4	20.5	S	S	S	S	S	S	36.2	S	S
Rail	S	S	S	S	S	S	S	S	S	32.8	30.4	38.2
Water	S	–	S	S	–	S	S	–	S	31.6	–	–
Air (including truck and air)	–	S	S	–	S	S	–	S	S	–	30.5	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	25.8	S	S
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	25.8	S	S
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	S	S	S	S	44.5	S	S	S	S	29.9	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