| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 3Q23 | 20,533 | -32.4% |
| 2Q23 | 29,141 | -3.2% |
| 1Q23 | 30,485 | +1.2% |
| 3Q22 | 30,361 | +7.9% |
| 2Q22 | 30,107 | +10.4% |
| 1Q22 | 30,110 | -3.5% |
| 3Q21 | 28,136 | -11.8% |
| 2Q21 | 27,265 | -14.4% |
| 1Q21 | 31,186 | -9.1% |
| 4Q20 | 27,740 | -19.0% |
| 3Q20 | 31,899 | +22.7% |
| 2Q20 | 31,850 | -22.8% |
| 1Q20 | 34,313 | -36.6% |
| 4Q19 | 34,253 | -17.5% |
| 3Q19 | 26,007 | -33.7% |
| 2Q19 | 41,282 | +7.7% |
| 1Q19 | 54,131 | +59.7% |
| 4Q18 | 41,530 | +25.5% |
| 3Q18 | 39,238 | +40.6% |
| 2Q18 | 38,315 | +44.4% |
| 1Q18 | 33,896 | +31.9% |
| 4Q17 | 33,081 | +19.6% |
| 3Q17 | 27,911 | +14.9% |
| 2Q17 | 26,539 | +12.6% |
| 1Q17 | 25,690 | +3.7% |
| 4Q16 | 27,661 | +7.1% |
| 3Q16 | 24,293 | +10.6% |
| 2Q16 | 23,564 | +15.4% |
| 1Q16 | 24,763 | +20.8% |
| 4Q15 | 25,824 | +22.6% |
| 3Q15 | 21,968 | +1.1% |
| 2Q15 | 20,423 | +17.0% |
| 1Q15 | 20,499 | +5.6% |
| 4Q14 | 21,068 | +18.3% |
| 3Q14 | 21,738 | +16.9% |
| 2Q14 | 17,461 | -9.5% |
| 1Q14 | 19,405 | +0.5% |
| 4Q13 | 17,806 | -12.1% |
| 3Q13 | 18,601 | -10.2% |
| 2Q13 | 19,294 | +8.9% |
| 1Q13 | 19,305 | +5.3% |
| 4Q12 | 20,260 | - |
| 3Q12 | 20,708 | +15.3% |
| 2Q12 | 17,711 | - |
| 1Q12 | 18,329 | - |
| 3Q11 | 17,954 | - |