The three pie charts below show the changes in annual spending by a particular UK school in 1981, 1991 and 2001.

The three diagrams give the information about a specific UK school yearly spending constitution - including teachers’ salaries, other workers’ salaries, furniture and equipment, resources, and insurance - in three different years, 1981, 1991, and 2001. Overall, among these years, teacher’s salaries always took the champion of expenditure in comparison to insurance, the least cost of all expenses each year. Teachers’ salary began with 40% in 1981, rose to 50% in the first decade, and then dropped to 45% in 2001. The same pattern also shown on resources, which started with 15%, then merely increased 5% in 1991, and decreased to 9% in 2001. Though furniture and equipment had the same fluctuated pattern during these years, it actually showed the completely different but more dramatic form. In 1981, it constituted the same percentage with resources, but fell to 5% in 1991, then grew sharply by 18% to 23% in the last year. Unlike three compositions above, other workers’ salaries demonstrated the steadily downward trend, with the start from 28% to 15%, in comparison with insurance, which showed the upward trend from merely 2% to 8%.