b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2019 (Continued)Pension gratuity benefits2019 2018(x US$1) Staatsolie SPCS GOw2 Total Staatsolie SPCS GOw2 TotalDefined benefit obligation as at January 1(2,987,963) (19,694)-(3,007,657) (2,964,598) (17,941)-(2,982,539)Interest cost (111,280) (847)-(112,127) (130,171) (807)-(130,978)Pastservicecost- -(55,899) (55,899) - - - -Currentservicecost (172,417) (3,006)-(175,423) (167,992) (2,652)-(170,644)Net benefit expense (recognized in P&L) (283,697) (3,853) (55,899) (343,449) (298,163) (3,459)-(301,622)Benefitspaid 149,218- -149,218 132,224- -132,224Experience different than assumed (7,007) 920-(6,087) 241,263 182-241,445Changes in assumptions (366,737) (6,098) (1,789) (374,624) (98,689) 1,524-(97,165)Sub total included in OCI (373,744) (5,178) (1,789) (380,711) 142,574 1,706-144,280Defined benefit obligation as at December 31(3,496,186)(28,725)(57,688)(3,582,599)(2,987,963)(19,694)- (3,007,657)Supplementary provision board members(x US$1) 2019 2018Defined benefit obligation as at January 1 (818,618) (733,249)Interest cost (27,833) (32,996)Currentservicecost (43,647) (42,715)Net benefit expense (recognized in P&L) (71,480) (75,711)Benefitspaid 270,795- Experience different than assumed (99,256) 25,479Changes in assumptions (39,754) (35,137)Sub total included in OCI (139,010) (9,658)Defined benefit obligation as at December 31 (758,313)(818,618)106 STAATSOLIE 2019 ANNUAL REPORT'