The three pie charts show the changes in annual spending by a particular UK school in 1987,1991,and 2001.

The given pie charts illustrates the yearly spending by a particular school of United Kingdom during years 1981,1991 and 2001.

According to the first pie chart 40 percent money was spent on teachers' salaries in 1981. 28 percent gone to other workers' salary in the same year. Money spent on furniture and equipment as well as resources like books had 30 percent (each had 15 %).
Insurance was only 2 percent in 1981.

Second pie chart represents that in 1991 50 percent money was spent on teacher's salary, which was 10 percent more as compare to 1981. 5 percent more (20 %) money was spent on resources in 1991, which was 15 percent in 1981. Other workers' salaries and furniture were decreased to 22 percent and 5 percent respectively. Money spent on insurance was 3 percent in 1991.

In 2001, 45 percent of money gone to teachers' salaries. Money spent on insurance was 8 % in 2001. Furniture and equipments gone to 23 %. However, resources and salary of workers had decreased to 9 % and 15 % respectively.

To sum up, in 2001 money spent on insurance was four times more than in 1981 . Also furniture and equipment got more spending of money in 2001.