The chart below show the percentages pf students passing the national examinations for gcse in three areas in binh phuoc province from 2011 to 2013

The bar chart provides information about the proportion of candidates who passed the national examinations for gcse in chon thanh, loc ninh and bu dang between 2011 and 2013. Overall, all three areas showed an upward trend throughout the period. However the rate of chon thanh had fluctuations. Although bu dang initially had a lower rate, it outraced the others at the end of the period. As it can be seen from the chart, the proportion in chon thanh and loc ninh reached 60% and approximately 70% respectively, while the proportion in bu dang was under 60% in 2011. A year later in 2012, the proportion went up nearly a third in chon thanh, reaching 89%, and that in Loc Ninh and Bu Dang were both slightly increased to 70%. However, in 2013, the proportion of Bu Dang had a sharp jump to 90%, one and a half more than that in 2011, having widen the gaps between bu dang and the other two areas.