In addition, the collection of energy consumption data in a format that is fully consistant with OECD economic statistics provides a key tool to link economic and energy variables. Core Data - Vol. Also, historical datasets have been unified. In SSIS, the following official annual data derived from industrial surveys, classified by ISIC Revision 2 and Revision 3, are collected. For more information on SSIS click here .
Own use refers to the primary and secondary energy consumed during transformation.
Transportation relates to the movement of materials by pipeline, road, railway, air and internal navigation that is carried out directly by the industry under consideration. In other words, the energy data in the SSIS Energy Database covers the amount of primary and secondary fuels purchased to support the activity of the industry in question. In addition, the quantity of electricity consumed and the quantity of electricity produced on-site for its own use are asked for separately. For cost reasons most of these surveys involve some kind of sampling. Sampling patterns vary across countries and through time, as does the ability of the country to estimate for the unsampled portion.