Table:
|  | Year ended December 31, 2019 | Year ended December 31, 2018 | Year ended December 31, 2017 |
| --- | --- | --- | --- |
| North America | $2,259 | $4,248 | $5,513 |
| Europe | 179,009 | 142,688 | 124,857 |
| Asia | 67,468 | 135,614 | 91,552 |
| South America | 232,394 | 208,751 | 212,616 |
| Other | 1,319 | 26,438 | 28,511 |
| Total | $482,449 | $517,739 | $463,049 |
Paragraphs:
NAVIOS MARITIME HOLDINGS INC. NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (Expressed in thousands of U.S. dollars — except share data)
Revenue by Geographic Region
Vessels operate on a worldwide basis and are not restricted to specific locations. Accordingly, it is not possible to allocate the assets of these operations to specific countries. The total net book value of long-lived assets for dry bulk vessels amounted to $741,347 and $933,784 at December 31, 2019 and 2018, respectively. For the Logistics Business, all long-lived assets are located in South America. The total net book value of long-lived assets for the Logistics Business amounted to $536,342 (including constructions in progress of $4,046, referred to in Note 7) and $556,713 at December 31, 2019 and 2018, respectively. The total net book value of long-lived assets for the Containers Business amounted to at December 31, 2018 $399,979.
Question:
How many years did total revenue exceed $500,000 thousand?