| （単位：千ドル） | 減価償却費 | 前年比（％） |
|---|---|---|
| 4Q22 | 5,000 | 0.0% |
| 3Q22 | 4,000 | -20.0% |
| 2Q22 | 4,000 | -29.1% |
| 1Q22 | 5,000 | -6.7% |
| 4Q21 | 5,000 | -7.7% |
| 3Q21 | 5,000 | -14.0% |
| 2Q21 | 5,643 | -9.9% |
| 1Q21 | 5,357 | -16.4% |
| 4Q20 | 5,418 | -18.3% |
| 3Q20 | 5,815 | -13.2% |
| 2Q20 | 6,260 | -8.2% |
| 1Q20 | 6,407 | -7.8% |
| 4Q19 | 6,629 | - |
| 3Q19 | 6,700 | - |
| 2Q19 | 6,821 | - |
| 1Q19 | 6,950 | - |
| 4Q17 | 7,888 | -3.9% |
| 3Q17 | 8,914 | +7.7% |
| 2Q17 | 7,958 | -3.8% |
| 1Q17 | 8,043 | -0.1% |
| 4Q16 | 8,208 | +0.6% |
| 3Q16 | 8,278 | +4.3% |
| 2Q16 | 8,272 | +6.6% |
| 1Q16 | 8,053 | +5.3% |
| 4Q15 | 8,158 | - |
| 3Q15 | 7,937 | - |
| 2Q15 | 7,757 | +12.6% |
| 1Q15 | 7,645 | +13.0% |
| 2Q14 | 6,887 | -2.2% |
| 1Q14 | 6,765 | -1.7% |
| 4Q13 | 7,035 | +3.9% |
| 3Q13 | 7,138 | +8.8% |
| 2Q13 | 7,039 | +14.8% |
| 1Q13 | 6,880 | +14.6% |
| 4Q12 | 6,772 | +14.9% |
| 3Q12 | 6,560 | +13.8% |
| 2Q12 | 6,134 | +2.5% |
| 1Q12 | 6,005 | +1.9% |
| 4Q11 | 5,893 | +8.5% |
| 3Q11 | 5,766 | +17.0% |
| 2Q11 | 5,985 | +24.2% |
| 1Q11 | 5,891 | +19.4% |
| 4Q10 | 5,430 | - |
| 3Q10 | 4,930 | - |
| 2Q10 | 4,817 | - |
| 1Q10 | 4,935 | - |