;4th quarter 2017;4th quarter 2018;Change in per cent; A. TOTAL REVENUE;304638;349381;14.7; Operating surplus extraction of petroleum;21713;32229;48.4; Tax revenue;194037;221601;14.2; Members' and employers' contribution to the National Insurance Scheme;56570;60542;7.0; Interest and dividends;8922;16058;80.0; Other revenue;23396;18951;-19.0; ;;;; B. TOTAL EXPENDITURE;314970;339928;7.9; Operating costs;52715;55200;4.7; Total fixed capital formation;23737;21602;-9.0; Total transfers;238518;263126;10.3; ;;;; C. SURPLUS BEFORE NET TRANSFERS TO THE GOVERNMENT PENSION FUND - GLOBAL;-10332;9453;;