| years | 2010 | 2011 | 2012 | 2013 |
| % | 92 | 76 | 87 | 70 |
From the above data and chart, it can be noted that in the year 2010 and 2012 percentage was higher compared to the years 2011 and 2013.
The year 2010 recorded the highest percentage about 92%, year 2012 recorded the second highest at 87% the third highest percentage was 76 for the year 2011 and year 2013 recorded the least percentage with 70%. To conclude, the performance is declining year by year which is alarming.
