pre_text: ADVANCED ENERGY INDUSTRIES, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (continued) (in thousands, except per share amounts) NOTE 10. INVENTORIES Our inventories are valued at the lower of cost or net realizable value and computed on a first-in, first-out (FIFO) basis. Components of inventories are as follows:
table: December 31,
table: 2019 2018
table: Parts and raw materials $134,816 $76,647
table: Work in process 10,269 6,644
table: Finished goods 84,934 14,696
table: Total $230,019 $97,987
question: Analyse this data from a financial earnings document. What was the change in inventories of finished goods between 2018 and 2019?