| （単位：千ドル） | 有価証券 | 前年比（％） |
|---|---|---|
| 4Q19 | 0 | -100.0% |
| 3Q19 | 2,254 | -52.7% |
| 2Q19 | 2,497 | -47.5% |
| 1Q19 | 4,247 | -84.9% |
| 4Q18 | 4,736 | -85.2% |
| 3Q18 | 4,763 | -72.4% |
| 2Q18 | 4,757 | -86.8% |
| 1Q18 | 28,204 | -45.7% |
| 4Q17 | 32,015 | -45.2% |
| 3Q17 | 17,230 | -72.7% |
| 2Q17 | 36,081 | -25.0% |
| 1Q17 | 51,939 | +3.5% |
| 4Q16 | 58,382 | +23.7% |
| 3Q16 | 63,137 | +68.2% |
| 2Q16 | 48,114 | +22.7% |
| 1Q16 | 50,202 | +53.9% |
| 4Q15 | 47,191 | +43.4% |
| 3Q15 | 37,527 | +16.1% |
| 2Q15 | 39,220 | -12.9% |
| 1Q15 | 32,624 | -31.1% |
| 4Q14 | 32,898 | -65.0% |
| 3Q14 | 32,329 | -27.8% |
| 2Q14 | 45,035 | +20.4% |
| 1Q14 | 47,341 | -4.4% |
| 4Q13 | 94,012 | +61.1% |
| 3Q13 | 44,806 | -32.4% |
| 2Q13 | 37,401 | -40.0% |
| 1Q13 | 49,512 | -8.5% |
| 4Q12 | 58,372 | +13.3% |
| 3Q12 | 66,282 | +72.2% |
| 2Q12 | 62,320 | - |
| 1Q12 | 54,130 | - |
| 4Q11 | 51,524 | - |
| 3Q11 | 38,483 | - |