;NOK million;NOK million;Per cent; 2017;2016;2016 - 2017; Income statement;;;; Operating income (NOK million);5415932;4997377;8.4; Operating profit (NOK million);523707;377028;38.9; Operating profit before tax (NOK million);930654;568570;63.7; Net profit (NOK million);685692;416107;64.8; Balance sheet;;;; Fixed assets;8936630;8372798;6.7; Current assets;3369446;3122903;7.9; Equity;5607981;5066003;10.7; Liabilities;6698095;6429698;4.2; ;Per cent;Per cent;Percentage points; Key figures;;;; Operating profit margin;9.7;7.5;2.2; Return on total assets;8.7;6.2;2.5; Return on equity;12.3;8.4;3.9; Equity ratio;45.6;44.1;1.5;