The provided pie charts illustrate the qualifications of staff in an advertising company between 1990 and 2010.
Overall, there were dramatic rises in the percentage of Ph.D. Science, also the percentage of Ph.D.-Art had a slight increase, whereas the percentage of First Degree-Art and Science all dramatically decreased. What is more, there was a slight change in the percentage of Master-Science and Art.
In 1990, the percentage of Master-Science used to be the largest overall, at 29%, and it then remained unchanged in 2010. The proportion of Master-Art had a slight increase from 21% in 1990 to 23% in 2010. Similarly, The proportion of Ph.D.-Science experienced a significant rise from 13% in 1990 to 30% in 2010, this obviously was a little more dramatic than Master’s degree. Also, the proportion of Ph.D.-Art had increased from 2% to 5% in this period.
On the other hand, the proportion of First degree of Science and Art showed a different trend, dropping respectively by 9%(from 20% to 11%) and 13%(from 15% to 2%) during this time. And the drop in proportion of First degree-Science smaller than the First degree-Art.
