pre_text: GreenSky, Inc. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued) (United States Dollars in thousands, except per share data, unless otherwise stated) The following table presents activities associated with our loan receivable sales and servicing activities during the periods indicated.
table: Year Ended December 31,
table: 2019 2018 2017
table: Gain (loss) on sold loan receivables held for sale $— $— $(500)
table: Cash Flows
table: Sales of loans $91,946 $139,026 $72,071
table: Servicing fees 3,901 2,321 2,821
question: Analyse this data from a financial earnings document. What was the change in the sales of loans between 2017 and 2018?