Table:
|  |  | For the year ended December 31, |  |
| --- | --- | --- | --- |
|  | 2017 | 2018 | 2019 |
| Crew wages and vessel management employee costs | 72,652 | 79,624 | 80,713 |
| Technical maintenance expenses | 28,736 | 28,694 | 37,653 |
| Other vessel operating expenses | 21,098 | 19,766 | 21,296 |
| Total | 122,486 | 128,084 | 139,662 |
Paragraphs:
GasLog Ltd. and its Subsidiaries
Notes to the consolidated financial statements (Continued)
For the years ended December 31, 2017, 2018 and 2019
(All amounts expressed in thousands of U.S. Dollars, except share and per share data)
15. Vessel Operating and Supervision Costs
An analysis of vessel operating and supervision costs is as follows:
Question:
What was the change in technical maintenance expenses from 2017 to 2018?
Answer: 28694 - 28736  = -42