Band 6+: The charts below show the qualifications of staff in an advertising company in 1990 and 2010. Provide an overview of the information by identifying and describing the key details, and include comparisons where appropriate.

The pie graph indicates the proportion of staff qualifications in an advertising company between 1990 and 2010. Overall, almost categories saw their proportion decreasing over the period shown, with the exception of PhD-Science and PhD-Art and Master-Science, whose two former figures increased and the latter stayed the same throughout.

A substantial proportional decline was observed in both first degree-science and First Degree-Art, with qualification sliding from 20% to 11%, and decreasing from 15% to 2%, respectively. Similarly, a 2% reduction was shown in Master-Art. In contrast, the Master-Science, was the only category no change over the years, consistently accounting for 29% of the total.

Moving to the upward segments, PhD-Science increased significantly, almost doubling than its proportion in 1990. It exceeded Master-Science to claim the first spot in 2010, peaking at 30% of the total. PhD-Art experienced similar, albeit less pronounced, changes. This group was much smaller compared to the other qualifications, with its figures increasing slightly to around 5% in 2010.