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

The three pie graphs illustrate the variations in yearly expenditure by one school in the United Kingdom across three separate years 1981, 1991, and 2001.

Overall

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, Teachers' wages had the biggest spending over the three years. The other

significant

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significance

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were

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was

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that the amount spent on insuring the school went up steadily,

while

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the money spent on the other workers gradually went down. In 1981, the budget spent on teachers' salaries was 40%, the annual spending went up to exactly half and

then

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decreased to 45%. The other workers' salaries in 1981 around a quarter, gradually went down in 1991 and 2001 when declined between 22% to 15%. Insurance began with a tiny proportion in the first 20 years with 2% and 3%, and

then

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significantly increased to nearly a tenth in 2001. Resources fluctuated between 9% and 20%. Furniture and equipment

also

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fluctuated between 5% and 23%.