However, since the decline of phosphate production from its peak in 1975, the domestic residential sector is now the dominant user. Nauru relies entirely on petroleum (Figure 9.1), with fuel imports accounting for 8 per cent of GDP in 2014 (SPC, 2016). 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.