| （単位：千ドル） | 有利子負債合計 | 前年比（％） |
|---|---|---|
| 4Q21 | 400 | -50.0% |
| 3Q21 | 400 | -50.0% |
| 2Q21 | 400 | -50.0% |
| 1Q21 | 400 | -50.0% |
| 4Q20 | 800 | -33.3% |
| 3Q20 | 800 | -33.3% |
| 2Q20 | 800 | -33.3% |
| 1Q20 | 800 | -33.3% |
| 4Q19 | 1,200 | -25.0% |
| 3Q19 | 1,200 | -25.0% |
| 2Q19 | 1,200 | -25.0% |
| 1Q19 | 1,200 | -25.0% |
| 4Q18 | 1,600 | -20.0% |
| 3Q18 | 1,600 | -20.0% |
| 2Q18 | 1,600 | -20.0% |
| 1Q18 | 1,600 | -20.0% |
| 4Q17 | 2,000 | -16.7% |
| 3Q17 | 2,000 | -16.7% |
| 2Q17 | 2,000 | -16.7% |
| 1Q17 | 2,000 | - |
| 4Q16 | 2,400 | - |
| 3Q16 | 2,400 | - |
| 2Q16 | 2,400 | - |