| Year | No. | Percentage (%) |
| March 2007 - Feb. 2008 | 63 | 11.1 |
| March 2008 - Feb.2009 | 44 | 7.7 |
| March 2009 - Feb.2010 | 47 | 8.3 |
| March 2010 - Feb.2011 | 45 | 7.9 |
| March 2011 - Feb.2012 | 36 | 6.3 |
| March 2012 - Feb.2013 | 62 | 10.9 |
| March 2013 - Feb.2014 | 61 | 10.7 |
| March 2014 - Feb.2015 | 45 | 7.9 |
| March 2015 - Feb.2016 | 100 | 19.6 |
| March 2016 - Feb.2017 | 66 | 11.6 |
| Total | 569 | 100% |