| （単位：千ドル） | 営業利益 | 前年比（％） |
|---|---|---|
| 4Q23 | -12,614 | -48.5% |
| 3Q23 | -16,928 | -35.8% |
| 2Q23 | -19,981 | -0.5% |
| 1Q23 | -22,263 | +2.0% |
| 4Q22 | -24,471 | +17.0% |
| 3Q22 | -26,369 | +20.7% |
| 2Q22 | -20,080 | +9.4% |
| 1Q22 | -21,820 | +38.0% |
| 4Q21 | -20,914 | +16.4% |
| 3Q21 | -21,851 | +47.3% |
| 2Q21 | -18,361 | +25.5% |
| 1Q21 | -15,813 | +7.4% |
| 4Q20 | -17,963 | +8.8% |
| 3Q20 | -14,837 | -19.0% |
| 2Q20 | -14,627 | -14.8% |
| 1Q20 | -14,722 | -13.0% |
| 4Q19 | -16,512 | +2.6% |
| 3Q19 | -18,306 | +8.7% |
| 2Q19 | -17,161 | +78.6% |
| 1Q19 | -16,925 | +99.0% |
| 4Q18 | -16,093 | +52.0% |
| 3Q18 | -16,839 | +89.8% |
| 2Q18 | -9,609 | -13.3% |
| 1Q18 | -8,506 | -22.6% |
| 4Q17 | -10,585 | -18.0% |
| 3Q17 | -8,872 | -21.7% |
| 2Q17 | -11,077 | -16.1% |
| 1Q17 | -10,986 | +26.6% |
| 4Q16 | -12,909 | +171.4% |
| 3Q16 | -11,336 | +124.4% |
| 2Q16 | -13,197 | -17.9% |
| 1Q16 | -8,678 | -46.8% |
| 4Q15 | -4,757 | -56.6% |
| 3Q15 | -5,052 | -37.9% |
| 2Q15 | -16,075 | +129.5% |
| 1Q15 | -16,297 | +135.4% |
| 4Q14 | -10,958 | - |
| 3Q14 | -8,131 | - |
| 2Q14 | -7,005 | - |
| 1Q14 | -6,924 | - |