Table:
|  | Fiscal 2019 (2) | Fiscal 2018(1)(2) | Fiscal 2017(2) | Fiscal 2016 (2)(3)(5) | Fiscal 2015(2)(4) |
| --- | --- | --- | --- | --- | --- |
|  |  |  | (Dollars in thousands, except per share data) |  |  |
| Consolidated Statements of Operations Data: |  |  |  |  |  |
| Revenues | $589,464 | $529,675 | $548,441 | $383,881 | $282,358 |
| Gross profit | 237,496 | 210,339 | 215,597 | 102,682 | 85,738 |
| Net income (loss) | 39,346 | 104,036 | 40,913 | (6,557) | (1,523) |
| Basic net income (loss) per share | 0.52 | 1.42 | 0.57 | (0.10) | (0.03) |
| Diluted net income (loss) per share | 0.51 | 1.38 | 0.55 | (0.10) | (0.03) |
| Consolidated Balance Sheets Data: |  |  |  |  |  |
| Cash, cash equivalents and marketable securities | $220,872 | $149,003 | $140,172 | $108,905 | $187,589 |
| Working capital | 282,483 | 235,302 | 213,693 | 172,002 | 214,437 |
| Total assets | 839,882 | 728,222 | 646,574 | 618,982 | 342,723 |
| Term loan, net of current portion | 15,639 | 34,971 | 87,228 | 125,475 | — |
| Total stockholders' equity | 640,997 | 580,164 | 458,637 | 401,056 | 294,681 |
| Number of employees | 1,836 | 1,676 | 1,685 | 1,571 | 958 |
Paragraphs:
Item 6: Selected Financial Data
The following selected consolidated financial data is derived from our consolidated financial statements. This data should be read in conjunction with our consolidated financial statements and the related notes, and Item 7: Management's Discussion and Analysis of Financial Condition and Results of Operations contained elsewhere in this Annual Report on Form 10-K.
(1) Fiscal 2018 net income includes an income tax benefit of $75.8 million from a valuation allowance release against certain U.S. deferred tax assets. See Note 13 of Notes to Consolidated Financial Statements. (2) Fiscal 2019, 2018, 2017, 2016, and 2015 net income (loss) includes restructuring charges, net, of $0.5 million, $0.2 million, $0.8 million, $7.3 million and $0.6 million, respectively.
(3) Fiscal 2016 net loss includes impairment charges of $12.4 million. (4) Fiscal 2015 net loss includes the following: i) a $1.5 million gain from a business interruption insurance claim relating to a factory fire at a customer's facility; and ii) a $1.0 million net gain from the sale of intellectual property.
(5) Fiscal 2016 includes the following as a result of the Cascade Microtech acquisition: i) $82.6 million in revenue; ii) $27.8 million of intangible amortization expense; and iii) a $7.6 million charge for inventory-related step-up amortization.
Question:
In which years was revenue under 500,000 thousands?