| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 4Q18 | 7,583 | -25.5% |
| 3Q18 | 4,424 | -64.9% |
| 2Q18 | 4,872 | +97340.0% |
| 1Q18 | -5,340 | -129.4% |
| 4Q17 | 10,178 | +83.9% |
| 3Q17 | 12,596 | -44.9% |
| 2Q17 | 5 | -99.3% |
| 1Q17 | 18,185 | -40.0% |
| 4Q16 | 5,534 | -77.2% |
| 3Q16 | 22,858 | -20.8% |
| 2Q16 | 730 | -97.9% |
| 1Q16 | 30,314 | -10.9% |
| 4Q15 | 24,232 | -119.5% |
| 3Q15 | 28,866 | +130.2% |
| 2Q15 | 34,202 | +115.4% |
| 1Q15 | 34,023 | -22.3% |
| 4Q14 | -124,094 | -422.8% |
| 3Q14 | 12,540 | -58.6% |
| 2Q14 | 15,882 | -79.1% |
| 1Q14 | 43,788 | -45.9% |
| 4Q13 | 38,441 | -52.2% |
| 3Q13 | 30,326 | -56.7% |
| 2Q13 | 75,825 | +10.0% |
| 1Q13 | 80,972 | +14.1% |
| 4Q12 | 80,424 | +62.6% |
| 3Q12 | 69,989 | +7.3% |
| 2Q12 | 68,931 | +4.4% |
| 1Q12 | 70,993 | +25.6% |
| 4Q11 | 49,460 | -5356.1% |
| 3Q11 | 65,234 | +2.6% |
| 2Q11 | 66,014 | +3.5% |
| 1Q11 | 56,518 | - |
| 4Q10 | -941 | - |
| 3Q10 | 63,576 | - |
| 2Q10 | 63,762 | - |