| （単位：千ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 2023/12 | 17,444 | -2.1% |
| 2022/12 | 17,810 | +0.2% |
| 2021/12 | 17,774 | -8.0% |
| 2020/12 | 19,329 | -31.3% |
| 2019/12 | 28,122 | -42.7% |
| 2018/12 | 49,041 | -45.9% |
| 2017/12 | 90,708 | -31.2% |
| 2016/12 | 131,806 | -32.1% |
| 2015/12 | 194,001 | -14.7% |
| 2014/12 | 227,532 | +4.0% |
| 2013/12 | 218,854 | -10.9% |
| 2012/12 | 245,729 | +12.4% |
| 2011/12 | 218,688 | - |