| （単位：千ドル） | 営業費用 | 前年比（％） |
|---|---|---|
| 4Q18 | 63,970 | -7.8% |
| 3Q18 | 68,560 | -11.6% |
| 2Q18 | 64,529 | +5.3% |
| 1Q18 | 67,179 | +35.8% |
| 4Q17 | 69,359 | +24.6% |
| 3Q17 | 77,573 | +49.2% |
| 2Q17 | 61,254 | +18.9% |
| 1Q17 | 49,457 | -2.0% |
| 4Q16 | 55,681 | +4.6% |
| 3Q16 | 52,008 | +3.5% |
| 2Q16 | 51,499 | +7.5% |
| 1Q16 | 50,470 | +6.3% |
| 4Q15 | 53,210 | +5.1% |
| 3Q15 | 50,250 | +9.0% |
| 2Q15 | 47,928 | +9.5% |
| 1Q15 | 47,501 | +13.5% |
| 4Q14 | 50,632 | +12.5% |
| 3Q14 | 46,117 | +8.2% |
| 2Q14 | 43,765 | +4.3% |
| 1Q14 | 41,858 | +3.7% |
| 4Q13 | 45,023 | +4.4% |
| 3Q13 | 42,615 | +3.0% |
| 2Q13 | 41,968 | +2.9% |
| 1Q13 | 40,360 | +2.9% |
| 4Q12 | 43,110 | +5.6% |
| 3Q12 | 41,364 | +3.1% |
| 2Q12 | 40,768 | +2.0% |
| 1Q12 | 39,234 | - |
| 4Q11 | 40,809 | - |
| 3Q11 | 40,103 | - |
| 2Q11 | 39,970 | - |