| Date | Acquired | Amount |
|---|---|---|
| Jul 24, 2017 |
|
Undisclosed amount |
| Jul 21, 2016 |
|
Undisclosed amount |
| Jun 30, 2016 |
|
Undisclosed amount |
| Sep 29, 2015 |
|
Undisclosed amount |
| Jul 14, 2015 |
|
Undisclosed amount |
| Apr 25, 2015 |
|
Undisclosed amount |
| Feb 20, 2014 |
|
Undisclosed amount |
| Feb 06, 2008 |
|
Undisclosed amount |
