| （単位：千ドル） | 有価証券 | 前年比（％） |
|---|---|---|
| 4Q20 | 16,024 | -13.4% |
| 3Q20 | 22,516 | -9.7% |
| 1Q20 | 8,022 | -81.9% |
| 4Q19 | 18,499 | +9.1% |
| 3Q19 | 24,928 | +69.7% |
| 2Q19 | 31,862 | +53.9% |
| 1Q19 | 44,265 | +94.9% |
| 4Q18 | 16,960 | -75.5% |
| 3Q18 | 14,690 | +52.7% |
| 2Q18 | 20,705 | +54.4% |
| 1Q18 | 22,708 | +41.0% |
| 4Q17 | 69,366 | +142.4% |
| 3Q17 | 9,618 | -31.7% |
| 2Q17 | 13,409 | +2608.9% |
| 1Q17 | 16,109 | - |
| 4Q16 | 28,612 | - |
| 3Q16 | 14,085 | - |
| 2Q16 | 495 | - |