Description of Industries and Summary of Findings INDUSTRY 3011, TIRES AND INNER TUBES This industry is made up of establishments primarily engaged in manufacturing pneumatic casings, inner tubes, and solid and cushion tires for all types of vehicles, airplanes, farm equipment, and children's vehicles; tiring; camelback; and tire repair and retreading materials. Establishments primarily engaged in retreading tires are classified in industry 7534. The 1992 definition of this industry is the same as that used in the 1987 Standard Industrial Classification (SIC) system. The SIC number and title also are the same. In the 1992 Census of Manufactures, Industry 3011, Tires and Inner Tubes, had employment of 64.6 thousand. The employment figure was 1 percent below the 65.4 thousand reported in 1987. Compared with 1991, employment decreased 1 percent. The 1991 data are based on the Census Bureau's annual survey of manufactures (ASM), which is a sample survey conducted each year between censuses. The leading States in employment in 1992 were Alabama, North Carolina, Oklahoma, and Tennessee, accounting for approximately 45 percent of the industry's employment. These same States were the leaders in 1987 when they accounted for 43 percent of the industry's employment. The total value of shipments for establishments classified in this industry was $11.8 billion. Establishments in virtually all industries ship secondary products as well as products primary to the industry in which they are classified and have some miscellaneous receipts, such as resales and contract receipts. Industry 3011 shipped $11.2 billion of tires and inner tubes considered primary to the industry, $224.4 million of secondary products, and had $406.1 million of miscellaneous receipts, resales, and contract work. Thus, the ratio of primary products to the total of both secondary and primary products shipped by establishments in this industry was 98 percent (specialization ratio). In 1987, the specialization ratio also was 98 percent. Establishments in this industry also accounted for 99 percent of products considered primary to the industry no matter where they were actually produced (coverage ratio). In 1987, the coverage ratio also was 99 percent. The products primary to industry 3011, no matter in what industry they were produced, appear in file MC92F6A and aggregate to $11.3 billion. For further explanation of specialization and coverage ratios, see file MC92F5B and the appendixes. The total cost of materials, services, and fuels and energy used by establishments classified in the tires and inner tubes industry amounted to $5.4 billion. Data on specific materials consumed appear in file MC92F7. Single-establishment companies in this industry with less than 15 employees were excluded from the mail portion of the census. The data for these establishments (and a small number of larger establishments whose reports were not received at the time the data were tabulated) were obtained from administrative records of other agencies or developed from industry averages. These establishments accounted for 2 percent of the total value of shipments.