| Sept. 1, 2011 – Feb. 29, 2012 |
| Mar. 1, 2012 – Aug. 31, 2012 |
| Sep. 1, 2012 – Feb. 31, 2013 |
| Mar. 1, 2013 – Aug. 31, 2013 |
| Sep. 1, 2013 – Feb. 31, 2014 |
| Mar. 1, 2014 – Aug. 31, 2014 |
| Sep. 1, 2014 – Feb. 31, 2015 |
| Mar. 1, 2015 – Aug. 31, 2015 |
| Sep. 1, 2015 – Feb. 31, 2016 |
| Mar. 1, 2016 – Aug. 31, 2016 |
