| （単位：千ドル） | 有価証券 | 前年比（％） |
|---|---|---|
| 4Q20 | 375,609 | -24.0% |
| 3Q20 | 253,842 | -39.8% |
| 2Q20 | 335,634 | -7.3% |
| 1Q20 | 237,520 | -35.3% |
| 4Q19 | 494,135 | +95.1% |
| 3Q19 | 421,574 | +60.4% |
| 2Q19 | 362,197 | +33.9% |
| 1Q19 | 367,351 | +49.8% |
| 4Q18 | 253,299 | -16.3% |
| 3Q18 | 262,806 | -28.3% |
| 2Q18 | 270,584 | -3.4% |
| 1Q18 | 245,198 | -5.9% |
| 4Q17 | 302,711 | -19.4% |
| 3Q17 | 366,402 | +77.1% |
| 2Q17 | 280,045 | +54.5% |
| 1Q17 | 260,705 | +68.0% |
| 4Q16 | 375,680 | +102.8% |
| 3Q16 | 206,851 | +27.0% |
| 2Q16 | 181,304 | +18.1% |
| 1Q16 | 155,185 | -10.6% |
| 4Q15 | 185,277 | -50.3% |
| 3Q15 | 162,835 | -44.1% |
| 2Q15 | 153,548 | -33.1% |
| 1Q15 | 173,604 | -42.8% |
| 4Q14 | 372,542 | +18.0% |
| 3Q14 | 291,325 | +15.9% |
| 2Q14 | 229,412 | +38.6% |
| 1Q14 | 303,560 | +99.6% |
| 4Q13 | 315,776 | +7.2% |
| 3Q13 | 251,449 | +13.7% |
| 2Q13 | 165,520 | -7.7% |
| 1Q13 | 152,081 | -33.1% |
| 4Q12 | 294,653 | +24.6% |
| 3Q12 | 221,083 | -11.2% |
| 2Q12 | 179,326 | +29.3% |
| 1Q12 | 227,196 | +103.5% |
| 4Q11 | 236,444 | +64.9% |
| 3Q11 | 248,857 | +53.4% |
| 2Q11 | 138,671 | +33.7% |
| 1Q11 | 111,618 | - |
| 4Q10 | 143,371 | - |
| 3Q10 | 162,229 | - |
| 2Q10 | 103,740 | - |