| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 3Q18 | 66,979 | +156.0% |
| 2Q18 | 89,063 | +53.4% |
| 1Q18 | 48,070 | +31.0% |
| 4Q17 | 60,205 | +29.6% |
| 3Q17 | 26,161 | -54.0% |
| 2Q17 | 58,066 | -23.5% |
| 1Q17 | 36,706 | -10.9% |
| 4Q16 | 46,460 | +5.5% |
| 3Q16 | 56,843 | +6.5% |
| 2Q16 | 75,901 | +12.7% |
| 1Q16 | 41,191 | +5.2% |
| 4Q15 | 44,036 | -5.1% |
| 3Q15 | 53,384 | +5.5% |
| 2Q15 | 67,343 | +3.0% |
| 1Q15 | 39,152 | +34.8% |
| 4Q14 | 46,386 | +20.5% |
| 3Q14 | 50,589 | +12.0% |
| 2Q14 | 65,370 | +17.9% |
| 1Q14 | 29,049 | +14.1% |
| 4Q13 | 38,487 | +6.0% |
| 3Q13 | 45,182 | +22.9% |
| 2Q13 | 55,454 | +39.4% |
| 1Q13 | 25,469 | +90.8% |
| 4Q12 | 36,311 | +102.6% |
| 3Q12 | 36,754 | +21.5% |
| 2Q12 | 39,784 | +55.3% |
| 1Q12 | 13,351 | - |
| 4Q11 | 17,923 | - |
| 3Q11 | 30,257 | - |
| 2Q11 | 25,619 | - |