| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 4Q20 | -69,807 | -719.1% |
| 4Q19 | 11,275 | -75.2% |
| 4Q18 | 45,506 | +30.2% |
| 3Q18 | 48,088 | +267.9% |
| 2Q18 | 61,855 | -1.4% |
| 1Q18 | 26,441 | -12.7% |
| 4Q17 | 34,948 | -5.7% |
| 3Q17 | 13,072 | -73.2% |
| 2Q17 | 62,703 | -1.1% |
| 1Q17 | 30,282 | +43.7% |
| 4Q16 | 37,068 | -9.9% |
| 3Q16 | 48,846 | -6.6% |
| 2Q16 | 63,422 | -8.6% |
| 1Q16 | 21,079 | +19.3% |
| 4Q15 | 41,141 | +15.1% |
| 3Q15 | 52,274 | +2.8% |
| 2Q15 | 69,353 | +24.1% |
| 1Q15 | 17,668 | +23.6% |
| 4Q14 | 35,730 | +45.0% |
| 3Q14 | 50,832 | +47.9% |
| 2Q14 | 55,886 | +52.6% |
| 1Q14 | 14,295 | +300.6% |
| 4Q13 | 24,640 | -15.0% |
| 3Q13 | 34,368 | +78.4% |
| 2Q13 | 36,622 | +11.8% |
| 1Q13 | 3,568 | -56.6% |
| 4Q12 | 28,997 | +1.3% |
| 3Q12 | 19,263 | +424.7% |
| 2Q12 | 32,771 | +17.1% |
| 1Q12 | 8,221 | -628.3% |
| 4Q11 | 28,626 | - |
| 3Q11 | 3,671 | - |
| 2Q11 | 27,979 | - |
| 1Q11 | -1,556 | - |