pre_text: ITEM 6. SELECTED FINANCIAL DATA. The following selected financial data has been derived from our audited financial statements. This data should be read in conjunction with Item 7— “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our financial statements and related notes thereto included elsewhere in this Form 10-K. Our historical results are not necessarily indicative of operating results to be expected in the future.
table: Selected Financial Data (in thousands, except per share data)
table: Year Ended September 30,
table: 2019 2018 2017 2016 2015
table: Income Statement Data
table: Revenue $84,590 $63,559 $45,390 $34,701 $25,367
table: Operating income (loss) $(4,590) $(7,806) $2,769 $1,824 $1,892
table: Net income (loss) $(724) $(11,807) $14,092 $1,959 $2,526
table: Net income (loss) per share—basic $(0.02) $(0.33) $0.43 $0.06 $0.08
table: Net income (loss) per share—diluted $(0.02) $(0.33) $0.40 $0.06 $0.08
table: Balance Sheet Data
table: Working capital $34,082 $17,221 $41,342 $31,980 $24,005
table: Total assets $135,897 $127,150 $71,719 $48,385 $38,746
table: Other borrowings $556 $810 $— $— $—
table: Stockholders’ equity $107,333 $95,394 $61,408 $39,485 $30,433
question: Analyse this data from a financial earnings document. What is the average total assets for the last 5 years, i.e. 2015 to 2019?