| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 1Q21 | 6,539 | -88.9% |
| 3Q20 | 45,166 | -36.5% |
| 2Q20 | 39,233 | -44.7% |
| 1Q20 | 59,019 | -19.4% |
| 4Q19 | 66,251 | +2.5% |
| 3Q19 | 71,095 | +10.4% |
| 2Q19 | 70,954 | +15.0% |
| 1Q19 | 73,264 | +24.8% |
| 4Q18 | 64,649 | -0.9% |
| 3Q18 | 64,419 | +5.9% |
| 2Q18 | 61,712 | -5.5% |
| 1Q18 | 58,705 | -15.0% |
| 4Q17 | 65,263 | -18.8% |
| 3Q17 | 60,815 | -17.8% |
| 2Q17 | 65,279 | -15.4% |
| 1Q17 | 69,039 | +6.3% |
| 4Q16 | 80,359 | +20.8% |
| 3Q16 | 73,953 | +13.0% |
| 2Q16 | 77,176 | -3.2% |
| 1Q16 | 64,928 | -5.7% |
| 4Q15 | 66,539 | +59.0% |
| 3Q15 | 65,436 | -6.3% |
| 2Q15 | 79,753 | +21.7% |
| 1Q15 | 68,826 | +9.1% |
| 4Q14 | 41,845 | -25.3% |
| 3Q14 | 69,850 | +3.8% |
| 2Q14 | 65,535 | +3.0% |
| 1Q14 | 63,066 | +6.3% |
| 4Q13 | 56,019 | -30.4% |
| 3Q13 | 67,271 | -15.8% |
| 2Q13 | 63,610 | -15.1% |
| 1Q13 | 59,332 | -14.7% |
| 4Q12 | 80,516 | -0.7% |
| 3Q12 | 79,888 | -1.0% |
| 2Q12 | 74,885 | -13.7% |
| 1Q12 | 69,544 | -16.7% |
| 4Q11 | 81,072 | - |
| 3Q11 | 80,735 | -5.2% |
| 2Q11 | 86,781 | +13.2% |
| 1Q11 | 83,467 | - |
| 3Q10 | 85,189 | - |
| 2Q10 | 76,643 | - |