| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 4Q17 | 255,000 | +1.2% |
| 3Q17 | 460,000 | +29.2% |
| 2Q17 | 420,000 | +11.7% |
| 1Q17 | 397,000 | -0.5% |
| 4Q16 | 252,000 | +46.5% |
| 3Q16 | 356,000 | -17.6% |
| 2Q16 | 376,000 | -19.8% |
| 1Q16 | 399,000 | +28.3% |
| 4Q15 | 172,000 | +537.0% |
| 3Q15 | 432,000 | +27.8% |
| 2Q15 | 469,000 | +7.6% |
| 1Q15 | 311,000 | -13.9% |
| 4Q14 | 27,000 | -95.2% |
| 3Q14 | 338,000 | -29.4% |
| 2Q14 | 436,000 | +1.9% |
| 1Q14 | 361,000 | -8.1% |
| 4Q13 | 562,000 | -1377.3% |
| 3Q13 | 479,000 | +82.1% |
| 2Q13 | 428,000 | +35.0% |
| 1Q13 | 393,000 | +48.9% |
| 4Q12 | -44,000 | -127.0% |
| 3Q12 | 263,000 | +2.7% |
| 2Q12 | 317,000 | -0.3% |
| 1Q12 | 264,000 | -7.0% |
| 4Q11 | 163,000 | +14.0% |
| 3Q11 | 256,000 | -8.6% |
| 2Q11 | 318,000 | +23.7% |
| 1Q11 | 284,000 | +56.0% |
| 4Q10 | 143,000 | - |
| 3Q10 | 280,000 | - |
| 2Q10 | 257,000 | - |
| 1Q10 | 182,000 | - |