| （単位：千ドル） | 投資有価証券 | 前年比（％） |
|---|---|---|
| 4Q18 | 0 | -100.0% |
| 3Q18 | 850 | -98.2% |
| 2Q18 | 6,586 | -90.5% |
| 1Q18 | 18,383 | -77.3% |
| 4Q17 | 31,019 | -23.9% |
| 3Q17 | 47,575 | -34.3% |
| 2Q17 | 69,105 | -21.4% |
| 1Q17 | 80,903 | +0.5% |
| 4Q16 | 40,779 | -46.7% |
| 3Q16 | 72,439 | +40.9% |
| 2Q16 | 87,944 | +52.9% |
| 1Q16 | 80,488 | +15.3% |
| 4Q15 | 76,507 | +29.2% |
| 3Q15 | 51,422 | -8.0% |
| 2Q15 | 57,519 | +55.1% |
| 1Q15 | 69,835 | +113.2% |
| 4Q14 | 59,233 | -8.1% |
| 3Q14 | 55,886 | +5.7% |
| 2Q14 | 37,086 | +58.3% |
| 1Q14 | 32,756 | - |
| 4Q13 | 64,419 | +2141.4% |
| 3Q13 | 52,871 | +410.3% |
| 2Q13 | 23,427 | +37.3% |
| 1Q13 | 0 | -100.0% |
| 4Q12 | 2,874 | -94.7% |
| 3Q12 | 10,361 | -62.4% |
| 2Q12 | 17,057 | +115.8% |
| 1Q12 | 32,672 | - |
| 4Q11 | 54,315 | - |
| 3Q11 | 27,524 | - |
| 2Q11 | 7,903 | - |