pre_text: Item 6. Selected Financial Data The following table sets forth selected consolidated financial data for each of the fiscal years ended June 30, 2019, 2018, 2017, 2016 and 2015 derived from the Company’s audited financial statements (in thousands, except per share amounts). The consolidated financial data as of and for the years ended June 30, 2015 are derived from the audited financial statements which have not been adjusted for the adoption of Accounting Standards update 2014- 09, Revenue from Contracts with Customers (Topic 606). These tables should be reviewed in conjunction with the Consolidated Financial Statements in Item 8 and related Notes, as well as Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” Historical results may not be indicative of future results. (1) Operating income (loss) include the following operating expenses (in thousands): (2)  The significant increase in net revenues during the year ended June 30, 2018 was primarily due to the acquisitions of the Campus Fabric and Data Center Businesses.
table: Year Ended June 30,
table: 2019 2018 2017 2016 2015
table: Consolidated Statements of Operations Data:                    
table: Net revenues $995,789 $983,142 (2) $607,084 $519,834 $552,940
table: Operating income (loss) (1) $(14,726) $(38,210) $6,040 $(30,029) $(62,994)
table: Net loss $(25,853) $(46,792) $(1,744) $(36,363) $(71,643)
table: Net loss per share – basic $(0.22) $(0.41) $(0.02) $(0.35) $(0.72)
table: Net loss per share – diluted $(0.22) $(0.41) $(0.02) $(0.35) $(0.72)
table: Shares used in per share calculation – basic 117,954 114,221 108,273 103,074 99,000
table: Shares used in per share calculation – diluted 117,954 114,221 108,273 103,074 99,000
question: Analyse this data from a financial earnings document. What was the change in the basic shares used in per share calculation between 2017 and 2018?