| YEAR | NO | % CREDIT | % FAIL |
| 2005 | 15970 | 5047 (31.60%) | 68.40% |
| 2006 | 15947 | 6705 (39.57%) | 60.43% |
| 2007 | 17308 | 4865 (28.10%) | 71.90% |
| 2008 | 18239 | 5761 (31.58%) | 68.42% |
| 2009 | 18546 | 4877 (26.30%) | 73.70% |
| 2010 | 19440 | 5886 (30.28%) | 69.72% |
| 2011 | 18770 | 5327 (28.38%) | 71.62% |