however since the decline of phosphate production from its peak in the domestic residential sector is now the dominant user nauru relies entirely on petroleum figure with fuel imports accounting for per cent of gdp in spc the nauru utilities commission nuc provides all energy services to nauru except for the australian refugee camp and the main processing plant of the republic of nauru phosphate corporation ronphos which generate their own power the government purchases petroleum for supply to all customers except ronphos which does its own purchasing