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

The three pie charts describe the differences in utilities and allowances

in particular

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UK schools during 1981, 1991, and 2001.

Overall

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, The annual school spending showed significant change over a decade in various aspects especially insurance which showed a gradual improvement throughout the year

while

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the other workers' salaries sharply decreased

at the end

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of the year. Insurance, which experienced steady improvement compared to other sectors over the decennium began with 2% in 1981, 3% in 1991 and 8% in 2001 respectively.

Following

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this

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, the second leading most spent ratio was for teachers' salaries and furniture and equipment that accounted for 40% and 15% in 1981 and progressed and maintained to 45% and 23% in 2001 with fluctuation slightly in the middle of the year 1991 as peaked 50% in salary and sudden dip around 5% in utility before reaching larger. Resources like books and other workers' salaries dramatically became less

bothered

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bothering

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across

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over

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the years.

Thus

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, books proportions as 15%, 20%, and 9% in 1981, 1991 and 2001 appropriately.

Also

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, 28%, 22% and 15% in other workers pay in the years 1981, 1991, and 2001.