| （単位：千ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 2025/12 | 19,067 | +4.9% |
| 2024/12 | 18,176 | -0.4% |
| 2023/12 | 18,243 | +3.3% |
| 2022/12 | 17,668 | +0.6% |
| 2021/12 | 17,570 | -3.4% |
| 2020/12 | 18,184 | -3.2% |
| 2019/12 | 18,779 | +0.6% |
| 2018/12 | 18,669 | -1.7% |
| 2017/12 | 18,991 | -3.2% |
| 2016/12 | 19,627 | -3.7% |
| 2015/12 | 20,388 | -1.8% |
| 2014/12 | 20,758 | +3.5% |
| 2013/12 | 20,050 | +0.6% |
| 2012/12 | 19,925 | +3.6% |
| 2011/12 | 19,229 | +5.2% |
| 2010/12 | 18,279 | - |