| （単位：ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 2023/12 | 727,000 | +2.3% |
| 2022/12 | 711,000 | -11.1% |
| 2021/12 | 800,000 | -2.6% |
| 2020/12 | 821,000 | -5.0% |
| 2019/12 | 864,000 | +13.1% |
| 2018/12 | 764,000 | +11.5% |
| 2017/12 | 685,000 | +1.0% |
| 2016/12 | 678,000 | +69.9% |
| 2015/12 | 399,000 | +23.1% |
| 2014/12 | 324,000 | +8.0% |
| 2013/12 | 300,000 | -2.0% |
| 2012/12 | 306,000 | -18.2% |
| 2011/12 | 374,000 | - |