| （単位：千ドル） | 純有利子負債 | 前年比（％） |
|---|---|---|
| 1Q19 | -1,493 | -101.8% |
| 4Q18 | -4,972 | -106.1% |
| 3Q18 | 129,468 | +57.7% |
| 2Q18 | 127,475 | +62.6% |
| 1Q18 | 84,361 | +6.2% |
| 4Q17 | 81,213 | +4.8% |
| 3Q17 | 82,120 | +36.5% |
| 2Q17 | 78,375 | +19.8% |
| 1Q17 | 79,449 | +61.9% |
| 4Q16 | 77,486 | +59.8% |
| 3Q16 | 60,182 | +115.3% |
| 2Q16 | 65,437 | +132.0% |
| 1Q16 | 49,064 | +55.8% |
| 4Q15 | 48,477 | +51.0% |
| 3Q15 | 27,950 | -12.1% |
| 2Q15 | 28,210 | -8.5% |
| 1Q15 | 31,484 | -0.5% |
| 4Q14 | 32,099 | +67.9% |
| 3Q14 | 31,792 | +65.2% |
| 2Q14 | 30,837 | +66.0% |
| 1Q14 | 31,645 | +67.3% |
| 4Q13 | 19,114 | +2.9% |
| 3Q13 | 19,245 | - |
| 2Q13 | 18,578 | - |
| 1Q13 | 18,916 | - |
| 4Q12 | 18,583 | - |