| 季度 | 持股数 | 市值（亿美元） |
|---|---|---|
| 2017 Q1 | 2,280,138 | 3.1 |
| 2016 Q4 | 3,870,760 | 5.6 |
| 2016 Q3 | 4,025,140 | 6.1 |
| 2016 Q2 | 7,601,140 | 10.8 |
| 2016 Q1 | 7,601,140 | 10.9 |
| 2015 Q4 | 20,549,076 | 26.7 |
| 2015 Q3 | 20,549,076 | 26.2 |
| 2015 Q2 | 20,549,076 | 28.1 |
| 2015 Q1 | 20,549,076 | 31.1 |
| 2014 Q4 | 20,549,076 | 29.6 |
| 2014 Q3 | 20,549,076 | 26.8 |
| 2014 Q2 | 20,549,076 | 26.4 |
| 2014 Q1 | 20,549,076 | 24.5 |
| 2013 Q4 | 20,549,076 | 23.0 |
| 2013 Q3 | 20,545,284 | 21.9 |
| 2013 Q2 | 10,095,708 | 9.2 |