| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 3Q18 | 35,381 | -12.9% |
| 2Q18 | 41,554 | +85.8% |
| 1Q18 | 35,664 | +20.6% |
| 4Q17 | 31,090 | +26.2% |
| 3Q17 | 40,628 | +61.4% |
| 2Q17 | 22,365 | -8.9% |
| 1Q17 | 29,564 | +7.3% |
| 4Q16 | 24,636 | +2.2% |
| 3Q16 | 25,176 | +8.7% |
| 2Q16 | 24,560 | +6.7% |
| 1Q16 | 27,548 | +18.3% |
| 4Q15 | 24,094 | +5.3% |
| 3Q15 | 23,166 | +3.1% |
| 2Q15 | 23,028 | +26.3% |
| 1Q15 | 23,296 | +19.5% |
| 4Q14 | 22,873 | +55.5% |
| 3Q14 | 22,469 | +13.5% |
| 2Q14 | 18,233 | 0.0% |
| 1Q14 | 19,498 | +59.1% |
| 4Q13 | 14,707 | +46.2% |
| 3Q13 | 19,803 | +76.4% |
| 2Q13 | 18,229 | -1269.3% |
| 1Q13 | 12,255 | +14.5% |
| 4Q12 | 10,057 | -14.3% |
| 3Q12 | 11,225 | +0.8% |
| 2Q12 | -1,559 | -113.2% |
| 1Q12 | 10,699 | - |
| 4Q11 | 11,731 | - |
| 3Q11 | 11,133 | - |
| 2Q11 | 11,838 | - |