The given pie charts illustrate the employees with various qualifications in one advertising company over the 20 year period.
Overall, it is evident that PhD qualifications gained popularity over two decades,while percentage of first degree showed a decline. Meanwhile, the proportion of master remained unchanged or increased slightly.
According to the charts, In 1990, the majority of staff had qualifications in Master’s science, making up 29%. Followed by Master’s in art by 21% and first degree in Science at 20%. In addition, First degree in art accounted for 15% of all employees, higher degrees were less common. By comparison, only 13% had a PhD in science and a mere 2% held a PhD in art.
By 2010, The most pronounced growth was observed in the proportion of PhD science earners, with the figure surging from 13% to 30%, thereby surpassing other categories. By contrast, those having first degrees in either art or science represented a decrease in their proportions. Although employees with PhD art degrees improved slightly , it only reached 5% up from 2%.