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Table 12. Relative Standard Errors for Table 2

Selected Characteristics	Total	Light-Duty Vehicles	Light Trucks/ Step Vans	Medium Trucks	Heavy Trucks	Buses
Total Vehicles	10	7	21	17	35	30
SIC Codes
Ag./For./Fish.	12	11	27	35	38	NC
Mining	5	10	6	276	33	NC
Construction	4	3	15	8	20	162
Manufacturing	6	7	25	12	18	83
Trans./Com./Util.	26	21	44	24	47	49
Wholesale Trade	8	8	30	11	16	NC
Retail Trade	12	28	13	36	46	NC
Fin./Ins./Re.	7	5	132	47	141	NC
Services	8	10	19	28	30	36
Fleet Size (number of vehicles)
10 to 19	3	5	33	11	25	44
20 to 49	3	11	26	21	17	41
50 or More	17	14	33	10	42	56
Annual Miles Traveled
0 to 10,000	16	20	12	6	13	15
10,001 to 20,000	14	14	31	10	14	52
20,001 to 50,000	6	9	25	12	10	16
50,001 or More	54	41	17	14	67	3
No Answer	13	13	8	7	32	25
Miles Before Replacement
0 to 50,000	13	20	29	25	17	43
50,001 to 100,000	13	12	41	7	13	12
100,001 to 250,000	12	13	21	18	18	4
250,001 or More	NC	NC	NC	NC	NC	NC
No Answer	21	7	7	16	13	25
Age of Vehicles (Gasoline and Diesel Vehicles Only)
Less than 4 years	16	9	30	21	48	31
4 to 6 years	8	10	39	22	20	37
More than 6 years	13	18	26	25	14	43
No Answer	127	134	556	NC	NC	NC

Table Notes

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