pre_text: (a) GitHub has been included in our consolidated results of operations starting on the October 25, 2018 acquisition date. (b) Includes a $2.6 billion net income tax benefit related to intangible property transfers and a $157 million net charge related to the enactment of the Tax Cuts and Jobs Act (“TCJA”), which together increased net income and diluted earnings per share (“EPS”) by $2.4 billion and $0.31, respectively. Refer to Note 12 – Income Taxes of the Notes to Financial Statements for further discussion. (c) Includes a $13.7 billion net charge related to the enactment of the TCJA, which decreased net income and diluted EPS by $13.7 billion and $1.75, respectively. Refer to Note 12 – Income Taxes of the Notes to Financial Statements for further discussion. (d) Reflects the impact of the adoption of new accounting standards in fiscal year 2018 related to revenue recognition and leases. (e) LinkedIn has been included in our consolidated results of operations starting on the December 8, 2016 acquisition date. (f) Includes $306 million of employee severance expenses primarily related to our sales and marketing restructuring plan, which decreased operating income, net income, and diluted EPS by $306 million, $243 million, and $0.04, respectively. (g) Includes $630 million of asset impairment charges related to our Phone business and $480 million of restructuring charges associated with our Phone business restructuring plans, which together decreased operating income, net income, and diluted EPS by $1.1 billion, $895 million, and $0.11, respectively. (h) Includes $7.5 billion of goodwill and asset impairment charges related to our Phone business and $2.5 billion of integration and restructuring expenses, primarily associated with our Phone business restructuring plans, which together decreased operating income, net income, and diluted EPS by $10.0 billion, $9.5 billion, and $1.15, respectively.
table: (In millions, except per share amounts)
table: Year Ended June 30, 2019 (a) 2018 2017 (d)(e) 2016 (d) 2015
table: Revenue $ 125,843 $ 110,360 $ 96,571 $ 91,154 $ 93,580
table: Gross margin 82,933 72,007 62,310 58,374 60,542
table: Operating income 42,959 35,058 29,025 (f) 26,078 (g) 18,161(h)
table: Net income 39,240(b) 16,571(c) 25,489 (f) 20,539 (g) 12,193(h)
table: Diluted earnings per share 5.06 (b) 2.13(c) 3.25 (f) 2.56 (g) 1.48(h)
table: Cash dividends declared per share 1.84 1.68 1.56 1.44 1.24
table: Cash, cash equivalents, and short-term
table: investments 133,819 133,768 132,981 113,240 96,526
table: Total assets 286,556 258,848 250,312 202,897 174,303
table: Long-term obligations 114,806 117,642 106,856 66,705 44,574
table: Stockholders’ equity 102,330 82,718 87,711 83,090 80,083
question: Analyse this data from a financial earnings document. What was the average revenue over the 3 year period from 2017 to 2019?