The graphs depict the expertise of employees in an advertising agency in 1990 and 2010.
Overall, it can be observed that there are variabilities in the qualifications of staff in a ten-year period, with the first degree-science nearly exhibiting the pronounced improvement in two years. In contrast, the expertise of Ph.D-art maintained the lowest percentage in this period.
In 1990, the staff of master-science was recorded with the highest proportion 29%. The others like master-art and first degree-science showed their percentage above 20% and lower that range was first degree-art and Ph.D science with 15% and 12% respectively.The smallest percentage was the employees of Ph.D-art.
In 2010, there was a dramatic increase in Ph.D-science from 12% to 30% reached the peak in both two years. However, the remaining staff-first degree-art, master-art,Ph.D-art and first degree-science followed a downward trend with the first degree-art declined intensely about 13% , the first degree-science decreased 9% and the others lessened modestly.
In comparison, the qualifications of staff in Ph.D science led the upward trend while the others such as first degree-art and first degree-science suffered a significant decline from 1990 from 2010. In 1990 first degree-science held the peak but it was being altered by Ph.D science in 2010.