| （単位：千ドル） | 純有利子負債 | 前年比（％） |
|---|---|---|
| 4Q18 | -107,231 | +51.5% |
| 3Q18 | -100,882 | +8.6% |
| 2Q18 | -78,705 | +5.0% |
| 1Q18 | -70,755 | +86.8% |
| 4Q17 | -70,795 | +57.0% |
| 3Q17 | -92,902 | +25.0% |
| 2Q17 | -74,972 | +22.3% |
| 1Q17 | -37,873 | +50.7% |
| 4Q16 | -45,094 | +357.8% |
| 3Q16 | -74,293 | +36.7% |
| 2Q16 | -61,297 | +1648.3% |
| 1Q16 | -25,133 | +111.4% |
| 4Q15 | -9,850 | -37.2% |
| 3Q15 | -54,365 | +25.0% |
| 2Q15 | -3,506 | -105.2% |
| 1Q15 | -11,888 | -109.7% |
| 4Q14 | -15,691 | -110.5% |
| 3Q14 | -43,479 | -143.1% |
| 2Q14 | 67,788 | -59.0% |
| 1Q14 | 123,115 | -4.9% |
| 4Q13 | 149,897 | -26.5% |
| 3Q13 | 100,767 | -55.6% |
| 2Q13 | 165,424 | -27.4% |
| 1Q13 | 129,515 | +82.7% |
| 4Q12 | 203,824 | -15.4% |
| 3Q12 | 226,704 | +27.1% |
| 2Q12 | 227,983 | -14.8% |
| 1Q12 | 70,886 | +47.4% |
| 4Q11 | 240,963 | +19.8% |
| 3Q11 | 178,402 | +101.1% |
| 2Q11 | 267,584 | -14.4% |
| 1Q11 | 48,086 | - |
| 4Q10 | 201,082 | - |
| 3Q10 | 88,735 | - |
| 2Q10 | 312,424 | - |