| （単位：ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 2023/12 | 196,000 | +1.6% |
| 2022/12 | 193,000 | -0.5% |
| 2021/12 | 194,000 | -3.0% |
| 2020/12 | 200,000 | +32.5% |
| 2019/12 | 151,000 | +79.8% |
| 2018/12 | 84,000 | -19.2% |
| 2017/12 | 104,000 | -35.4% |
| 2016/12 | 161,000 | -6.9% |
| 2015/12 | 173,000 | -25.8% |
| 2014/12 | 233,000 | -6.8% |
| 2013/12 | 250,000 | -7.4% |
| 2012/12 | 270,000 | -8.5% |
| 2011/12 | 295,000 | - |