| （単位：千ドル） | 純有利子負債 | 前年比（％） |
|---|---|---|
| 1Q18 | -193,761 | +20.0% |
| 4Q17 | -136,453 | -26.7% |
| 3Q17 | -111,035 | -0.0% |
| 2Q17 | -191,680 | +48.3% |
| 1Q17 | -161,457 | +10.1% |
| 4Q16 | -186,071 | +18.1% |
| 3Q16 | -111,053 | +26.0% |
| 2Q16 | -129,277 | -52.1% |
| 1Q16 | -146,679 | -34.3% |
| 4Q15 | -157,579 | -638.0% |
| 3Q15 | -88,161 | +9652.3% |
| 2Q15 | -269,695 | -8102.8% |
| 1Q15 | -223,221 | +18.7% |
| 4Q14 | 29,289 | +31.2% |
| 3Q14 | -904 | -106.0% |
| 2Q14 | 3,370 | -121.1% |
| 1Q14 | -188,004 | +41.5% |
| 4Q13 | 22,323 | -117.2% |
| 3Q13 | 15,001 | -110.6% |
| 2Q13 | -15,977 | -86.5% |
| 1Q13 | -132,900 | +17.7% |
| 4Q12 | -129,918 | +19.3% |
| 3Q12 | -142,020 | +4.6% |
| 2Q12 | -118,196 | -19.4% |
| 1Q12 | -112,913 | -30.4% |
| 4Q11 | -108,933 | -15.7% |
| 3Q11 | -135,815 | -14.1% |
| 2Q11 | -146,683 | +46.7% |
| 1Q11 | -162,288 | - |
| 4Q10 | -129,176 | - |
| 3Q10 | -158,079 | - |
| 2Q10 | -99,964 | - |