| September 30, 2013 |
|
| June 30, 2013 |
|
| March 31, 2013 |
|
| December 31, 2012 |
|
| September 30, 2012 |
|
| June 30, 2012 |
|
| March 31, 2012 |
|
| December 31, 2011 |
|
| September 30, 2011 |
|
| June 30, 2011 |
|
