Annual Report 2004 81 Australia International Consolidated 2004 2003 2004 2003 2004 2003 28. Segment Information (continued) $million $million $million $million $million $million Primary Reporting Geographic segments Revenue Total segment revenue 1,633.1 1,445.9 120.7 134.6 1,753.8 1,580.5 Other unallocated revenue (0.6) 38.9 Total revenue 1,753.2 1,619.4 Results Earnings before interest, tax and significant items 505.9 529.8 3.8 15.6 509.7 545.4 Significant items: Insurance recovery 116.6 – – – 116.6 – Costs associated with Moomba liquids recovery plant fire (17.5) – – – (17.5) – Profit on sale of oil and gas assets 43.9 – – – 43.9 – Write-down of exploration and development expenditure (4.7) (1.3) (17.4) (58.4) (22.1) (59.7) Organisation restructure costs (21.6) – – – (21.6) – Accelerated depreciation – Heytesbury – (20.2) – – – (20.2) 622.6 508.3 (13.6) (42.8) 609.0 465.5 Gain on sale of listed investments 0.1 45.8 Unallocated corporate expenses (34.7) (45.8) Earnings before interest and tax 574.4 465.5 Unallocated borrowing costs (33.6) (34.6) Profit from ordinary activities before income tax expense 540.8 430.9 Income tax expense (160.9) (103.9) Net profit after income tax attributable to the  shareholders of Santos Ltd 379.9 327.0 Non-cash expenses Depreciation, depletion and amortisation 434.4 454.9 90.8 65.9 525.2 520.8 Unallocated corporate depreciation, depletion and amortisation 14.5 10.8 Total depreciation, depletion and amortisation 539.7 531.6 Write-down of exploration and development expenditure 4.7 1.3 17.4 58.4 22.1 59.7 Unallocated corporate write-down of listed investment – 4.4 Total non-cash expenses 561.8 595.7 Acquisition of non-current assets Controlled entities 92.2 24.0 35.1 – 127.3 24.0 Oil and gas assets, property, plant and equipment 761.8 587.0 146.4 140.0 908.2 727.0 Unallocated corporate acquisition of oil and gas assets,  property, plant and equipment 21.3 23.3 Total acquisition of non-current assets 1,056.8 774.3 Assets Segment assets 5,120.1 4,447.8 694.7 602.7 5,814.8 5,050.5 Unallocated corporate assets 141.2 167.8 Consolidated total assets 5,956.0 5,218.3 Liabilities Segment liabilities 2,129.1 1,678.3 120.9 174.9 2,250.0 1,853.2 Unallocated corporate liabilities 207.7 277.2 Consolidated total liabilities 2,457.7 2,130.4 Secondary Reporting Business segments The Santos Group operates predominantly in one business, namely the explor ation, development, production, transportation and marketing of hydrocarbons. Revenue is derived from the sale of gas and liquid hydrocarbon s and the transportation of crude oil.