| （単位：千ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 2023/12 | 6,941 | -3.8% |
| 2022/12 | 7,218 | -55.8% |
| 2021/12 | 16,334 | -7.3% |
| 2020/12 | 17,629 | -1.2% |
| 2019/12 | 17,851 | -5.1% |
| 2018/12 | 18,807 | +1.0% |
| 2017/12 | 18,614 | -16.7% |
| 2016/12 | 22,359 | -12.8% |
| 2015/12 | 25,654 | +4.7% |
| 2014/12 | 24,499 | +94.0% |
| 2013/12 | 12,631 | +19.1% |
| 2012/12 | 10,608 | 0.0% |
| 2011/12 | 10,607 | -1.7% |
| 2010/12 | 10,790 | - |