| （単位：千ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 2025/1 | 15,927 | -10.5% |
| 2024/1 | 17,794 | -1.0% |
| 2023/1 | 17,976 | -0.3% |
| 2022/1 | 18,031 | -13.8% |
| 2021/1 | 20,906 | -9.1% |
| 2020/1 | 23,007 | -7.3% |
| 2019/1 | 24,828 | +15.7% |
| 2018/1 | 21,462 | +10.0% |
| 2017/1 | 19,519 | +4.7% |
| 2016/1 | 18,639 | +11.0% |
| 2015/1 | 16,787 | -2.9% |
| 2014/1 | 17,284 | +4.1% |
| 2013/1 | 16,602 | +37.4% |
| 2012/1 | 12,086 | - |