b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2021 (Continued)Pension gratuity benefits2021 2020(x US$1) Staatsolie SPCS GOw2 Total Staatsolie SPCS GOw2 TotalDefined benefit obligation as at January 1(3,643,011) (46,479) (94,548) (3,784,038) (3,496,186) (28,725) (57,688) (3,582,599)Interest cost (80,231) (1,255) (2,080) (83,566) (90,253) (919) (4,863) (96,035)Pastservicecost (223,059) (11,922) (6,215) (241,196) (209,650) (3,047) (4,570) (217,267)Currentservicecost- - - - - -(24,613) (24,613)Net benefit expense (recognized in P&L) (303,290) (13,177) (8,295) (324,762) (299,903) (3,966) (34,046) (337,915)Benefitspaid 238,407-238,407 360,348-7,646 367,994Experience different than assumed 76,789 816 22,544 100,149 (106,141) (10,795) (1,091) (118,027)Changes in assumptions (194,314) (182) (664) (195,160) (101,129) (2,993) (9,369) (113,491)Sub total included in OCI (117,525) 634 21,880 (95,011) (207,270) (13,788) (10,460) (231,518)Defined benefit obligation as at December 31(3,825,419)(59,022)(80,963)(3,965,404)(3,643,011)(46,479)(94,548)(3,784,038)Supplementary provision board members(x US$1) 2021 2020Defined benefit obligation as at January 1 (743,509) (758,313)Interest cost (15,614) (14,504)Currentservicecost (28,930) (23,604)Net benefit expense (recognized in P&L) (44,544) (38,108)Benefitspaid-496,402Experience different than assumed 22,650 (459,841)Changes in assumptions (53,614) 16,351Sub total included in OCI (30,964) (443,490)Defined benefit obligation as at December 31 (819,017)(743,509)148 STAATSOLIE 2021 ANNUAL REPORT'