b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2018 (Continued)Retiree medical plan others2018 2017(in US$) GOw2 SPCS Total GOw2 SPCS TotalDefined benefit obligation as at January 1 (491,689) (239,962) (731,651) (423,847) (221,957) (645,804)Interest cost (60,325) (30,125) (90,450) (47,968) (9,889) (57,857)Current service cost (53,606) (46,611) (100,217) (36,750) (36,455) (73,205)Net benefit expense(recognized in P&L) (113,931) (76,736) (190,667) (84,718) (46,344) (131,062)Benefitspaid 6,610 - 6,610 2,146 - 2,146Currency translation 6,017 (1,038) 4,979 4,222 2,211 6,433Experience different than assumed 82,824 5,925 88,749 7,965 (12,192) (4,227)Changes in assumptions (72,320) 8,748 (63,572) 2,543 38,320 40,863Sub total included in OCI 16,521 13,634 30,155 14,730 28,339 43,069Defined benefit obligation as at December 31(582,489)(303,064)(885,553)(491,689)(239,962)(731,651)Funeral grant benefits2018 2017(in US$) Staatsolie SPCS Total Staatsolie SPCS TotalDefined benefit obligation as at January 1 (893,525) (8,128) (901,653) (832,772) (6,620) (839,392)Interest cost (40,076) (366) (40,442) (37,360) (298) (37,658)Current service cost (41,832) (1,473) (43,305) (41,047) (1,090) (42,137)Net benefit expense (recognized in P&L) (81,908) (1,839) (83,747) (78,407) (1,388) (79,795)Benefitspaid 6,006 - 6,006 879 - 879Experience different than assumed (8,340)(274) (8,614) (10,031) (364) (10,395)Changes in assumptions 118,245 1,684 119,929 26,80624427,050Sub total included in OCI 109,905 1,410 111,315 16,775 (120) 16,655Defined benefit obligation as at December 31(859,522)(8,557)(868,079)(893,525)(8,128)(901,653)92 STAATSOLIE 2018 ANNUAL REPORT'