pre_text: Postretirement Benefit Plans In addition to receiving pension benefits, U.S. Teradyne employees who meet early retirement eligibility requirements as of their termination dates may participate in Teradyne’s Welfare Plan, which includes medical and dental benefits up to age 65. Death benefits provide a fixed sum to retirees’ survivors and are available to all retirees. Substantially all of Teradyne’s current U.S. employees could become eligible for these benefits, and the existing benefit obligation relates primarily to those employees. The December 31 balances of the postretirement assets and obligations are shown below:
table: 2019 2018
table: (in thousands)
table: Assets and Obligations
table: Change in benefit obligation:
table: Projected benefit obligation:
table: Beginning of year $9,256 $6,177
table: Service cost 41 39
table: Interest cost 347 196
table: Actuarial loss 717 25
table: Benefits paid (1,358) (889)
table: Special termination benefits — 3,708
table: End of year 9,003 9,256
table: Change in plan assets:
table: Fair value of plan assets:
table: Beginning of year — —
table: Company contributions 1,358 889
table: Benefits paid (1,358) (889)
table: End of year — —
table: Funded status $(9,003) $(9,256)
question: Analyse this data from a financial earnings document. What was the change in Service Cost from 2018 to 2019?