Years Ended December 31,
2019
2018
Projected benefit obligation, beginning of year
$  33,178
$  34,498
Acquisition
48,350
1,063
Service cost
272
841
Interest cost
1,211
802
Actuarial loss
(193)
(988)
Benefits paid
(1,779)
(1,113)
Translation adjustment
2,223
(1,925)
Projected benefit obligation, end of year
$  83,262
$  33,178
Fair value of plan assets, beginning of year
$  13,433
$  14,181
Acquisitions
102
981
Actual return on plan assets
380
675
Contributions
644
828
Benefits paid
(1,176)
(1,086)
Actuarial gain
1,064
(1,357)
Translation adjustment
456
(789)
Fair value of plan assets, end of year
$  14,903
$  13,433
Funded status of plan
$  (68,359)
$  (19,745)

text: Defined Benefit Plan
text: We maintain defined benefit pension plans for certain of our non-U.S. employees in the U.K., Germany, and Philippines. Each plan is managed locally and in accordance with respective local laws and regulations.
text: In order to measure the expense and related benefit obligation, various assumptions are made including discount rates used to value the obligation, expected return on plan assets used to fund these expenses and estimated future inflation rates. These assumptions are based on historical experience as well as facts and circumstances. An actuarial analysis is used to measure the expense and liability associated with pension benefits.
text: In connection with the acquisition of Artesyn in September of 2019, the Company acquired certain pension plans and, as a result, started including the related balances in its Consolidated Balance Sheets at December 31, 2019 and the expenses attributable to these plans for the period from September 10, 2019 to December 31, 2019 in its Consolidated Statement of Operations. See Note 2. Business Acquisitions for more details on this transaction.
text: ADVANCED ENERGY INDUSTRIES, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (continued) (in thousands, except per share amounts)
text: The information provided below includes one pension plan which is part of discontinued operations. As such, all related liabilities and expenses are reported in discontinued operations in the Company’s Consolidated Balance Sheets and Consolidated Statements of Operations for all periods presented.
text: The Company’s projected benefit obligation and plan assets for defined benefit pension plans at December 31, 2019 and 2018 and the related assumptions used to determine the related liabilities are as follows:

Questions:
question: Where does the company report all related liabilities and expenses to discontinued operations?
answer: in discontinued operations in the Company’s Consolidated Balance Sheets and Consolidated Statements of Operations for all periods presented.
question: What was the acquisition in 2019?
answer: 48,350
scale: thousand
question: What was the service cost in 2018?
answer: 841
scale: thousand
question: What was the change in service cost between 2018 and 2019?
answer: -569
derivation: 272-841
scale: thousand
question: What was the change in interest cost between 2018 and 2019?
answer: 409
derivation: 1,211-802
scale: thousand
question: What was the percentage change in the fair value of plan assets, end of the year between 2018 and 2019?
answer: 10.94
derivation: ($14,903-$13,433)/$13,433
scale: percent