;Amount (NOK million);Per cent change;Per cent change; 2017;2016 - 2017;2012 - 2017; Main financial figures;;;; Gross operating revenue;447282;5.1;27.3; Gross operating expenditure;433001;5.6;26.2; Net operating surplus;16845;..;..; Gross investment expenditure;64912;2.6;50.0; ;;;; ;2017;2016;2012; National key figures;;;; Gross operating surplus as a percentage of total gross operating revenue;3.2;3.6;2.4; Net operating surplus as a percentage of total gross operating revenue;3.8;4.0;3.2; Unrestricted revenues per capita (NOK);64.9;65.7;66.8; Gross operating expenditure, administration and management expenditure, as a percentage of gross operating expenditure;6.0;5.9;6.9; Gross operating expenditure, kindergarten, as a percentage of gross operating expenditure;11.5;11.7;12.0; Gross operating expenditure, primary and lower secondary education, as a percentage of gross operating expenditure;19.0;19.2;19.7; Gross op. exp., health and care services, percentage of total gross op. exp;30.3;30.5;31.6;