pre_text: ITEM 6. SELECTED FINANCIAL DATA (Dollars in thousands, except per share data and unless otherwise indicated) The Selected Consolidated Statements of Operations Data for the years ended December 31, 2019, 2018 and 2017 and the Selected Consolidated Balance Sheet Data as of December 31, 2019 and 2018 were derived from our Consolidated Financial Statements included in Item 8 of this Form 10-K. The Selected Consolidated Statements of Operations Data for the years ended December 31, 2016 and 2015 and the Selected Consolidated Balance Sheet Data as of December 31, 2017 and 2016 were derived from our audited Consolidated Financial Statements not included in this Form 10-K. Our historical results are not necessarily indicative of the results to be expected in the future. You should read the following financial information together with the information under Item 7 "Management's Discussion and Analysis of Financial Condition and Results of Operations" and the Consolidated Financial Statements and related notes included in Item 8. GS Holdings and GSLLC are our predecessors for accounting purposes and, accordingly, amounts prior to the Reorganization Transactions and IPO represent the historical consolidated operations of either GS Holdings or GSLLC and its subsidiaries. The amounts as of December 31, 2019 and 2018 and during the period from May 24, 2018 through December 31, 2019 represent those of consolidated GreenSky, Inc. and its subsidiaries. Prior to the Reorganization Transactions and IPO, GreenSky, Inc. did not engage in any business or other activities except in connection with its formation and initial capitalization. See Note 1 to the Notes to Consolidated Financial Statements in Item 8 for further information on our organization. (1) Basic and diluted earnings per share of Class A common stock are applicable only for the period from May 24, 2018 through December 31, 2019, which is the period following the Reorganization Transactions and IPO. See Note 2 to the Notes to Consolidated Financial Statements in Item 8 for further information.
table: Year Ended December 31,
table: Selected Consolidated Statements of Operations Data: 2019 2018 2017 2016 2015
table: Total revenue $529,646 $414,673 $325,887 $263,865 $173,457
table: Cost of revenue (exclusive of depreciation and amortization) 248,580 160,439 89,708 79,145 36,506
table: Total costs and expenses 408,693 261,883 180,288 144,054 80,351
table: Operating profit 120,953 152,790 145,599 119,811 93,106
table: Total other income (expense), net (32,105) (19,276) (6,931) 4,653 713
table: Income before income tax expense 88,848 133,514 138,668 124,464 93,819
table: Income tax expense (benefit) (7,125) 5,534 — — —
table: Net income 95,973 127,980 138,668 124,464 93,819
table: Net income attributable to noncontrolling interests 63,993 103,724 N/A N/A N/A
table: Net income attributable to GreenSky, Inc. 31,980 24,256 N/A N/A N/A
table: Earnings per share of Class A common stock(1):
table: Basic $0.52 $0.43 N/A N/A N/A
table: Diluted $0.49 $0.41 N/A N/A N/A
question: Analyse this data from a financial earnings document. What was the change in the cost of revenue between 2017 and 2018?