| （単位：千ドル） | 投資有価証券 | 前年比（％） |
|---|---|---|
| 1Q21 | 5,000 | - |
| 4Q17 | 0 | -100.0% |
| 3Q17 | 0 | -100.0% |
| 2Q17 | 0 | - |
| 1Q17 | 0 | -100.0% |
| 4Q16 | 5,991 | -68.9% |
| 3Q16 | 12,020 | -39.4% |
| 2Q16 | 0 | -100.0% |
| 1Q16 | 16,782 | +2.8% |
| 4Q15 | 19,242 | +87.6% |
| 3Q15 | 19,847 | +63.7% |
| 2Q15 | 8,706 | -46.9% |
| 1Q15 | 16,332 | +5.9% |
| 4Q14 | 10,256 | -58.0% |
| 3Q14 | 12,122 | -41.0% |
| 2Q14 | 16,385 | -15.8% |
| 1Q14 | 15,428 | -16.0% |
| 4Q13 | 24,410 | +371.1% |
| 3Q13 | 20,544 | +684.4% |
| 2Q13 | 19,453 | +548.6% |
| 1Q13 | 18,356 | +150.7% |
| 4Q12 | 5,181 | -50.9% |
| 3Q12 | 2,619 | - |
| 2Q12 | 2,999 | - |
| 1Q12 | 7,323 | - |
| 4Q11 | 10,554 | - |