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

The given three charts display the total percentage of institution expenditures spent yearly by one of the institutes in the UK in three decades, 1981, 1991 and 2001.

Overall

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, in all three

years

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, the school had spent half or nearly half of the expenditure on teachers' salaries

whereas

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the insurance sector hold the least. Now, to move into detail, in the early

years

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1981 and 1991, the money spent on other workers' stood

second

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highest after salary constituting 28% and 22% respectively but later after ten

years

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, that was in2001, it got reduced and furniture and equipment sectors replaced the position by taking sharing of cost nearly quarter from the total.

Further

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, among all these costing variables, the proportion of spending on insurance remained consistently minimal but hiked moderately with time from 2% to 3% and

then

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sharply to 8%. Meanwhile, the expense of furniture and equipment, and resources had oscillated over the

years

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.