| （単位：千ドル） | 配当金の支払額 | 前年比（％） |
|---|---|---|
| 1Q18 | 29,700 | 0.0% |
| 4Q17 | 30,200 | -0.4% |
| 3Q17 | 28,800 | -4.2% |
| 2Q17 | 30,300 | -6.8% |
| 1Q17 | 29,700 | -8.5% |
| 4Q16 | 30,309 | -8.9% |
| 3Q16 | 30,071 | +47.0% |
| 2Q16 | 32,518 | +50.4% |
| 1Q16 | 32,448 | +72.3% |
| 4Q15 | 33,262 | +74.0% |
| 3Q15 | 20,456 | +5.2% |
| 2Q15 | 21,616 | +4.2% |
| 1Q15 | 18,834 | +3.6% |
| 4Q14 | 19,113 | +4.2% |
| 3Q14 | 19,449 | +3.3% |
| 2Q14 | 20,753 | +3.0% |
| 1Q14 | 18,180 | +8.3% |
| 4Q13 | 18,351 | - |
| 3Q13 | 18,833 | - |
| 2Q13 | 20,155 | -43.0% |
| 1Q13 | 16,789 | +5.3% |
| 2Q12 | 35,349 | +101.3% |
| 1Q12 | 15,941 | -1.1% |
| 4Q11 | 16,527 | -2.3% |
| 3Q11 | 17,178 | - |
| 2Q11 | 17,558 | - |
| 1Q11 | 16,122 | - |
| 4Q10 | 16,916 | - |