pre_text: ADVANCED ENERGY INDUSTRIES, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (continued) (in thousands, except per share amounts) The Company’s effective tax rate differs from the U.S. federal statutory rate of 35% for the year ended December 31, 2017, primarily due to the benefit related to the wind down of our solar inverter business and earnings in foreign jurisdictions, which are subject to lower tax rates, offset by the impact of U.S. tax reform. The principal causes of the difference between the federal statutory rate and the effective income tax rate for each the years below are as follows:
table: Years Ended December 31,
table: 2019 2018 2017
table: Income taxes per federal statutory rate $14,111 $36,199 $69,348
table: State income taxes, net of federal deduction 10 2,372 1,794
table: Transition tax - U.S. Tax Reform — 1,174 61,690
table: Corporate tax rate changes - U.S. Tax Reform — (652) 11,177
table: Tax benefit associated with inverter business wind down — — (33,837)
table: Stock based compensation (97) (974) (5,263)
table: GILTI Tax 8,796 13,064 —
table: Tax effect of foreign operations (13,086) (19,162) (47,482)
table: Uncertain tax position (4,487) (3,088) 4,948
table: Unremitted earnings 1,624 2,564 —
table: Tax credits (6,280) (9,844) (658)
table: Change in valuation allowance 7,222 (1,306) 841
table: Withholding taxes 6,500 1,371 —
table: Other permanent items, net (3,614) 3,509 (468)
table: Total provision for income taxes $10,699 $25,227 $62,090
question: Analyse this data from a financial earnings document. What was the change in Unremitted earnings between 2018 and 2019?