The charts below show the qualifications of staff in an advertising company in 1990 and 2010. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The pie charts illustrate the proportions of employees with different qualifications in an advertising company in 1990 and 2010. Overall, it is clear that higher-level qualifications became more common over time, whereas the percentage of employees with lower qualifications declined significantly. In 1990, the largest proportion of staff held a first degree in science, accounting […]