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 pie charts illustrate how the total

expenditure

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of a particular school in the UK changed in 1981, 1991, and 2001.

Overall

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, it can be seen that

teachers

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'

salaries

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consistently took up the largest share of the budget over these years.

To begin

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with, in 1981, the school allocated 40% of its budget to

teachers

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'

salaries

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.

While

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other workers'

salaries

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accounted for 28%, spending on resources

such

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as books and furniture/equipment each made up 15%.

Finally

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, insurance was the smallest

expenditure

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at 2%.

Then

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in 1991,

teachers

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'

salaries

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increased to 50%, making it the largest expense.

On the other hand

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,

while

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workers'

salaries

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and spending on furniture and equipment decreased to 22% and 5% respectively, the

expenditure

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on resources went up by 5%. The percentage of insurance expenses rose by a mere 1%. Shifting to the

last

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graph, in 2001,

teachers

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'

salaries

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, though still the largest

expenditure

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, declined to 45%.

Although

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other workers'

salaries

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went down

further

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to 15%, spending on furniture and equipment increased substantially to 23%. Insurance costs

also

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saw a significant rise, accounting for 8% of the total spending. Ultimately, resource costs drop sharply to 9%.