The three pie charts below show the changes in annual spending by a particular UK school in 1981, 1991 and 2001.Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The three pie charts demonstrate the yearly expenditure by a specific UK school in the years 1981, 1991 and 2001. The different colored slices of each pie chart illustrate the spending in percentage on different areas. These include insurance, teachers’ salaries, furniture, books and other staff salaries.

The two areas that show steady trends over the years are insurance and other workers’ salaries. Insurance saw a rise from 1981 through 1991 to 2001, from 2percent to 3percent and 8percent, respectively. In contrast, other workers’ salaries saw a gradual decrease from 28percent through 22percent to 15percent.

Other areas experienced non-specific trends. Teachers’ salaries were increased from 40percent in 1981 to 50percent in 1991, but were decreased to 45percent in 2001. Similarly, money spent on books and resources was increased from 15percent in 1981 to 20percent in 1991, but fell to 9percent in 2001.

In contrast to teachers' salaries and money spent on books and resources, the spending on furniture and equipment, declined from 15percent in 1981 to 5percent in 1991, but then rose to 23percent in 2001.