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 charts illustrate special UK school's annual expenditure differences in 1981, 1991 and 2001.

Overall

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, teachers' salaries were dominant during these years and

in contrast

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, insurance costs became a minor percentage of the pie.

Although

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other workers' incomes showed some minor changes , they were predominant spending. Looking at the pies more closely, one can see that compared to 1981 and 2001, there was a slight rise in the

amount

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number

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of teachers which was half of the pie. The insurance expenditures saw a slow increase each year and they reached 8% by the end of 2001. Originally, the other workers' earnings dropped somewhat from 28% to 22% and

finally

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to 15% in 1981, 1991 and 2001 respectively.

On the other hand

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, the resources shown went up slightly from 15% to 20% between 1981 and 1991 and

then

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decreased rapidly to 9% in 2001.

Moreover

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, the furniture and equipment fell dramatically to 5% by the end of 1991 and

then

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went up to 23% in 2001.