b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2018 (Continued)Components of Revenue (X US$ 1,000) 2018 2017Ownrefinedproducts(gross) 447,226 368,595Intersegment sales(140,052) (129,923)Localrefinedproducts(net) 307,174 238,672Tradingactivities(gross) 153,334 156,899Intersegment sales(11,726) (10,581)Tradingactivities(net) 141,608 146,318Electric energy (gross) 75,196 64,189Intersegment sales(18,563) (15,801)Electric energy (net) 56,633 48,388Other revenues (gross) 358 300Total revenues 505,773 433,678 Revenues consist of the sales of petroleumtaken title and has assumed the risks and rewards products,electricenergyandtradeactivitiesof ofownership,pricesarefixedordeterminableandpetroleum products. Petroleum products arecollectability is reasonably assured. generally being sold at prevailing market prices. Revenuesarerecognizedwhenproductsare Sales between group companies (intersegment delivered,whichoccurswhenthecustomerhas sales)arebasedonpricesgenerallyequivalenttocommercially available prices.61'