SBS series on Purchases of energy products in industry are closely related to other SBS domains for which separate metadata files have been compiled (See annex at the bottom of the page). They cover the NACE Rev 1.1 sections C and D. The information has been collected once every two years (odd numbered years). Several characteristics on Purchases of energy products in industry have been defined. From 1997 till 2001 an extended series of characteristics was used, but the availability was limited, as not all EU member states have collected the data. 20 21 0 Purchases of hard coal 20 22 0 Purchases of coke 20 23 0 Purchases of patent fuels 20 24 0 Purchases of gas oil 20 25 0 Purchases of heavy fuel oil 20 26 0 Purchases of other petroleum products 20 27 0 Purchases of natural gas 20 28 0 Purchases of derived gas 20 29 0 Purchases of renewable energy sources 20 30 0 Purchases of heat 20 31 0 Purchases of electricity Since 2003, a more restricted set of characteristics is used: 20 11 1 Purchases of solid fuels 20 11 2 Purchases of petroleum products 20 11 3 Purchases of natural and derived gas 20 11 4 Purchases of renewable energy sources 20 11 5 Purchases of heat 20 11 6 Purchases of electricity The perspective is the energy cost: therefore the value of all purchases is collected. There isn't any information available on the quantities purchased.