| （単位：千ドル） | 売上原価 | 前年比（％） |
|---|---|---|
| 2Q18 | 513,800 | +1.1% |
| 1Q18 | 476,200 | -0.2% |
| 4Q17 | 498,543 | -0.0% |
| 3Q17 | 507,921 | +0.9% |
| 2Q17 | 507,979 | +2.2% |
| 1Q17 | 476,961 | +0.2% |
| 4Q16 | 498,617 | - |
| 3Q16 | 503,266 | -0.4% |
| 2Q16 | 496,801 | +1.7% |
| 1Q16 | 475,802 | +5.6% |
| 3Q15 | 505,200 | +4.4% |
| 2Q15 | 488,540 | +3.3% |
| 1Q15 | 450,553 | +4.2% |
| 3Q14 | 483,941 | +0.1% |
| 2Q14 | 472,909 | - |
| 1Q14 | 432,462 | - |
| 3Q13 | 483,513 | - |