| （単位：千ドル） | 有価証券 | 前年比（％） |
|---|---|---|
| 4Q19 | 4,497 | -87.6% |
| 3Q19 | 18,473 | -51.7% |
| 2Q19 | 30,907 | -26.1% |
| 1Q19 | 34,272 | -25.2% |
| 4Q18 | 36,201 | -49.2% |
| 3Q18 | 38,267 | +69.1% |
| 2Q18 | 41,832 | +53.5% |
| 1Q18 | 45,814 | +56.8% |
| 4Q17 | 71,316 | +133.4% |
| 3Q17 | 22,629 | -21.9% |
| 2Q17 | 27,249 | -1.8% |
| 1Q17 | 29,216 | +1.0% |
| 4Q16 | 30,552 | +31.4% |
| 3Q16 | 28,990 | +45.9% |
| 2Q16 | 27,746 | +46.9% |
| 1Q16 | 28,938 | +23.7% |
| 4Q15 | 23,258 | -1.0% |
| 3Q15 | 19,864 | -16.8% |
| 2Q15 | 18,892 | +29.2% |
| 1Q15 | 23,385 | +229.6% |
| 4Q14 | 23,499 | +103.6% |
| 3Q14 | 23,869 | +40.1% |
| 2Q14 | 14,624 | -24.6% |
| 1Q14 | 7,096 | -72.0% |
| 4Q13 | 11,541 | -69.3% |
| 3Q13 | 17,036 | -49.5% |
| 2Q13 | 19,406 | -25.6% |
| 1Q13 | 25,352 | +22.0% |
| 4Q12 | 37,639 | +331.0% |
| 3Q12 | 33,743 | +191.8% |
| 2Q12 | 26,099 | +112.2% |
| 1Q12 | 20,787 | - |
| 4Q11 | 8,733 | - |
| 3Q11 | 11,565 | - |
| 2Q11 | 12,302 | - |