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	3.9	4.8	7.2	6.5	6.2	11.3	17.8	10.9	23.8	11.8	17.0	21.7
Single modes	3.8	4.2	7.0	6.7	5.0	11.6	19.1	11.9	26.1	15.2	34.6	29.9
Truck	5.8	5.6	8.5	17.2	13.7	23.7	S	16.3	S	18.2	40.6	44.5
Rail	13.8	14.3	18.3	10.8	24.2	19.8	12.2	20.3	20.1	5.2	5.0	8.0
Water	10.1	10.6	30.9	15.4	13.4	45.4	10.3	23.0	31.0	S	18.6	S
Air (including truck and air)	45.5	35.2	16.5	25.8	35.7	27.4	23.4	31.5	34.3	6.6	3.3	8.6
Pipeline	17.7	10.6	26.9	16.8	12.7	25.2	S	S	S	S	S	S
Multiple modes	13.0	9.8	19.9	30.8	41.5	32.1	41.4	29.5	59.9	8.2	6.0	10.6
Parcel, USPS or courier	15.2	10.8	27.7	16.1	11.8	39.7	23.2	14.3	60.2	8.6	6.0	10.9
Truck and rail	37.7	23.1	27.8	44.6	27.5	31.4	35.2	20.8	21.0	18.4	6.5	16.9
Other multiple modes	43.8	S	S	36.5	46.7	35.5	45.5	35.9	75.1	39.7	30.2	75.7
Other and unknown modes	41.9	31.1	22.1	S	36.7	S	S	29.0	S	27.9	24.7	63.2

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	21.0	20.6	43.5	22.2	23.8	74.9	31.3	14.9	82.7	S	S	S
Single modes	20.9	20.9	83.7	22.2	32.0	230.8	31.9	23.8	171.3	S	43.5	S
Truck	21.1	14.7	49.0	32.8	33.6	333.9	35.3	27.3	135.6	S	44.0	S
Rail	S	45.4	S	S	44.3	S	S	S	S	31.6	27.0	46.5
Water	30.5	41.8	179.2	29.4	41.1	283.0	31.9	38.1	170.9	S	27.6	S
Air (including truck and air)	–	S	S	–	S	S	–	S	S	–	31.6	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	41.2	S	S	49.5	S	S	49.6	S	25.5	30.6	130.9
Parcel, USPS or courier	S	S	S	S	S	S	46.7	S	S	24.9	39.3	148.6
Truck and rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Other multiple modes	S	42.2	S	S	49.6	S	S	49.6	S	31.6	25.8	S
Other and unknown modes	S	46.8	S	S	45.4	S	S	42.2	S	29.7	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	7.6	11.1	11.9	16.5	19.8	24.0	30.3	25.9	48.7	37.2	42.8	41.7
Single modes	7.4	10.8	11.9	16.6	18.9	23.8	30.2	23.4	50.4	39.1	29.8	48.8
Truck	9.1	11.0	13.3	18.1	18.0	24.0	27.2	15.1	33.0	40.2	29.8	49.1
Rail	39.1	18.3	45.1	43.9	32.8	101.5	48.9	36.8	107.1	17.9	14.4	20.4
Water	S	S	S	S	S	S	S	S	S	30.6	S	S
Air (including truck and air)	S	S	S	S	S	S	S	S	S	31.6	31.6	21.2
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	S	S	47.6	S	S	S	S	S	27.7	31.0	60.5
Parcel, USPS or courier	42.4	S	S	S	S	S	S	S	S	28.9	26.4	57.9
Truck and rail	S	S	S	S	S	S	S	S	S	31.6	31.0	35.9
Other multiple modes	S	S	S	S	S	S	S	S	S	27.9	31.6	71.1
Other and unknown modes	46.2	40.0	9.4	S	37.6	S	S	40.0	S	S	35.4	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	34.7	25.8	40.0	35.2	32.9	44.4	33.4	S	S	45.6	39.8	94.2
Single modes	35.1	27.6	41.0	36.9	33.5	43.2	33.3	S	S	32.5	47.3	66.9
Truck	37.7	35.9	62.2	38.1	43.0	64.1	29.9	34.6	39.9	31.8	39.7	63.8
Rail	S	S	S	S	S	S	S	S	S	27.0	28.4	63.3
Water	S	49.0	S	S	S	S	S	S	S	27.0	27.1	57.4
Air (including truck and air)	–	–	–	–	–	–	–	–	–	–	–	–
Pipeline	–	S	S	–	S	S	S	S	S	S	S	S
Multiple modes	S	S	S	S	S	S	S	S	S	31.6	34.2	17.8
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	31.6	31.6	10.1
Truck and rail	–	S	S	–	S	S	–	S	S	–	31.6	–
Other multiple modes	–	S	S	–	S	S	–	S	S	–	S	S
Other and unknown modes	45.5	S	S	28.4	42.5	339.4	S	S	S	44.7	28.3	245.8

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	8.6	5.5	14.0	8.7	8.9	16.7	9.3	21.4	34.6	S	S	S
Single modes	8.9	5.7	14.9	8.8	9.6	17.9	10.0	23.0	35.6	S	S	S
Truck	18.4	8.4	15.1	16.7	9.0	13.3	37.7	16.2	18.3	S	S	S
Rail	24.6	15.7	18.6	20.6	23.2	16.7	49.9	16.4	49.1	11.3	11.7	15.1
Water	13.6	20.2	63.9	13.0	26.6	65.8	13.7	28.1	64.3	S	16.8	S
Air (including truck and air)	–	–	–	–	–	–	–	–	–	–	–	–
Pipeline	18.6	12.0	27.4	17.7	14.8	25.9	S	S	S	S	S	S
Multiple modes	S	S	S	41.3	S	S	49.6	S	S	37.6	47.9	96.6
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	31.9	30.4	51.4
Truck and rail	–	S	S	–	S	S	–	S	S	–	29.4	–
Other multiple modes	S	S	S	41.3	S	S	49.6	S	S	26.6	36.9	93.9
Other and unknown modes	S	45.0	S	S	33.7	S	S	S	S	27.6	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	13.2	7.2	17.0	21.7	12.6	24.8	40.8	9.5	53.3	18.4	13.1	39.6
Single modes	11.4	7.0	15.0	21.5	11.6	25.6	41.2	9.7	56.4	17.9	16.5	42.3
Truck	16.8	10.7	23.8	S	24.7	S	S	27.1	S	18.1	17.6	51.4
Rail	12.0	7.3	13.7	9.2	6.8	9.7	9.4	8.5	11.4	2.9	4.1	5.6
Water	13.7	14.4	19.6	12.1	16.3	15.0	19.0	22.7	23.2	43.6	17.6	30.8
Air (including truck and air)	S	42.6	S	S	44.3	S	S	41.0	S	26.7	11.5	27.9
Pipeline	24.9	42.5	84.5	23.3	37.2	91.9	S	S	S	S	S	S
Multiple modes	31.3	18.2	57.0	37.9	33.7	16.1	39.8	32.0	16.2	16.1	17.0	33.9
Parcel, USPS or courier	39.0	25.6	165.2	S	49.0	S	S	33.9	S	15.4	17.9	35.0
Truck and rail	S	33.9	S	47.5	36.1	13.8	44.2	34.4	14.9	21.9	15.8	31.2
Other multiple modes	40.1	39.9	43.3	47.6	47.8	19.9	S	46.5	S	S	28.2	S
Other and unknown modes	S	29.3	S	S	48.1	S	S	35.4	S	S	17.8	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	14.3	20.3	18.7	12.1	38.0	19.9	6.5	37.7	23.0	32.9	10.9	11.5
Single modes	14.6	21.6	19.9	12.3	38.4	20.0	7.3	38.4	23.4	34.1	21.0	20.9
Truck	20.2	17.1	21.5	17.2	32.7	19.2	8.9	28.9	21.1	38.6	23.8	20.0
Rail	10.7	39.4	26.2	11.3	S	S	14.3	43.9	25.2	4.9	10.1	12.4
Water	S	S	S	S	S	S	S	S	S	30.0	29.8	6.9
Air (including truck and air)	S	S	S	S	S	S	S	S	S	21.7	31.4	55.8
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	29.8	26.2	17.9	S	32.2	S	S	33.9	S	15.4	5.1	8.6
Parcel, USPS or courier	34.3	30.8	16.3	22.4	28.0	16.5	35.9	31.7	7.7	16.1	5.2	8.9
Truck and rail	S	40.7	S	S	37.9	S	S	38.0	S	30.9	23.7	19.4
Other multiple modes	S	S	S	S	S	S	S	S	S	32.0	29.8	14.7
Other and unknown modes	41.8	25.0	52.7	37.2	26.8	25.5	45.7	41.7	18.5	S	39.9	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	7.8	8.0	11.6	S	42.1	S	13.2	34.2	22.8	19.8	22.4	23.7
Single modes	7.8	9.3	12.3	17.3	43.9	33.3	16.4	27.1	25.4	30.7	38.0	36.3
Truck	9.0	9.3	12.1	20.0	43.3	33.1	16.4	16.3	18.3	29.1	40.3	35.2
Rail	S	39.1	S	S	S	S	49.2	S	S	23.9	22.9	22.9
Water	S	S	S	38.1	S	S	40.5	S	S	S	41.5	S
Air (including truck and air)	S	25.9	S	S	32.4	S	S	31.1	S	21.0	11.2	39.9
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	20.8	16.2	28.3	26.2	S	S	34.0	S	S	24.8	11.2	20.6
Parcel, USPS or courier	20.8	17.3	34.4	26.7	17.1	48.7	39.1	13.4	78.0	25.4	11.3	21.0
Truck and rail	–	S	S	–	S	S	–	S	S	–	27.9	–
Other multiple modes	S	S	S	S	S	S	S	S	S	32.3	31.2	232.4
Other and unknown modes	39.6	27.8	65.8	S	28.7	S	S	31.7	S	S	28.4	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	31.0	24.1	44.2	35.6	17.6	56.2	S	32.4	S	47.2	28.9	67.6
Single modes	39.2	27.4	56.2	38.2	19.3	61.0	S	36.5	S	S	S	S
Truck	23.4	12.0	31.5	25.9	21.1	41.7	27.9	37.9	53.5	S	S	S
Rail	S	S	S	S	S	S	S	S	S	28.1	22.3	36.6
Water	S	S	S	S	S	S	S	S	S	S	27.9	S
Air (including truck and air)	S	30.2	S	S	S	S	S	S	S	24.5	11.7	28.9
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	18.9	21.0	29.2	40.9	25.8	115.9	S	16.7	S	14.1	14.9	15.3
Parcel, USPS or courier	21.5	21.0	28.8	48.8	26.2	112.4	S	16.8	S	13.6	14.9	15.0
Truck and rail	S	–	S	S	–	S	S	–	S	31.6	–	–
Other multiple modes	–	S	S	–	S	S	–	S	S	–	31.6	–
Other and unknown modes	43.5	29.8	24.2	S	S	S	S	S	S	S	41.4	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	12.8	14.6	34.9	24.8	24.2	35.0	41.8	17.7	45.0	21.8	23.9	35.0
Single modes	17.4	15.2	34.2	26.9	24.5	35.5	44.3	18.0	45.7	44.4	27.1	9.8
Truck	17.7	13.5	36.6	24.8	29.1	37.0	23.0	23.9	27.5	49.2	36.7	45.0
Rail	S	49.0	S	S	S	S	S	S	S	31.6	30.2	106.6
Water	S	S	S	S	S	S	S	S	S	S	29.8	S
Air (including truck and air)	43.4	44.2	2.5	49.0	41.0	11.0	S	40.7	S	22.1	18.6	36.1
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	22.9	23.6	102.9	38.7	32.1	165.3	46.7	S	S	16.4	22.8	54.5
Parcel, USPS or courier	22.9	23.4	104.4	38.7	32.0	198.9	46.7	46.0	352.5	16.4	22.9	54.6
Truck and rail	–	S	S	–	S	S	–	S	S	–	30.0	–
Other multiple modes	–	–	–	–	–	–	–	–	–	–	–	–
Other and unknown modes	47.4	37.0	270.9	S	S	S	S	S	S	36.1	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	14.5	46.1	15.6	23.4	S	S	S	S	S	S	S	S
Single modes	14.3	S	S	24.6	S	S	S	S	S	S	S	S
Truck	25.0	35.0	17.7	25.7	S	S	S	S	S	S	S	S
Rail	47.2	S	S	S	S	S	S	S	S	28.0	31.6	127.7
Water	S	S	S	S	S	S	S	S	S	31.6	31.5	3.4
Air (including truck and air)	–	S	S	–	S	S	–	S	S	–	31.6	–
Pipeline	–	–	–	–	–	–	S	S	S	S	S	S
Multiple modes	S	43.0	S	S	S	S	S	S	S	S	32.0	S
Parcel, USPS or courier	S	S	S	S	S	S	S	S	S	S	28.1	S
Truck and rail	–	–	–	–	–	–	–	–	–	–	–	–
Other multiple modes	S	S	S	S	S	S	S	S	S	31.6	31.6	4.2
Other and unknown modes	S	S	S	S	S	S	S	S	S	31.5	36.3	7.5

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