| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 2Q18 | 65,153 | +0.9% |
| 1Q18 | 72,195 | -3.7% |
| 3Q17 | 75,463 | +6.6% |
| 2Q17 | 64,545 | -14.4% |
| 1Q17 | 74,954 | +6.3% |
| 3Q16 | 70,783 | -8.5% |
| 2Q16 | 75,415 | +0.5% |
| 1Q16 | 70,511 | -8.8% |
| 3Q15 | 77,372 | +5.0% |
| 2Q15 | 75,008 | +10.1% |
| 1Q15 | 77,344 | +15.6% |
| 3Q14 | 73,694 | +11.9% |
| 2Q14 | 68,130 | +11.1% |
| 1Q14 | 66,928 | +3.5% |
| 3Q13 | 65,869 | +5.7% |
| 2Q13 | 61,317 | +0.3% |
| 1Q13 | 64,690 | +6.2% |
| 3Q12 | 62,297 | +14.4% |
| 2Q12 | 61,111 | +14.6% |
| 1Q12 | 60,918 | +11.8% |
| 3Q11 | 54,443 | +13.4% |
| 2Q11 | 53,308 | +10.0% |
| 1Q11 | 54,466 | - |
| 3Q10 | 48,026 | - |
| 2Q10 | 48,459 | - |