The tree 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 charts are illustrating how the annual spending of a particular UK school changed in 1981, 1991 and 2001. Units are measured in percentages.

Overall

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, it can be seen that the biggest part of the resources

were

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was

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invested in

teacher's

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teachers'

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salaries in all of the

years

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. Spending for things like books and physical improvements varied with time and insurance was the lowest expenditure for all of the

years

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. Paying their educational staff was the biggest spending in all three

years

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(40% in 1981, 45% in 2001 and a peak of 50% in 1991). Insurance

payment

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payments

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fluctuated between 2% in the first year and slightly raised

at

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to

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8% in the

last

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year, but it still was the smallest part of the budget. Other workers' salaries percentage decreased through the

years

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(28%, 22% and 15% respectively). Other things like resources and furniture and equipment varied between 9% and 23%

,

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apply

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but yet remained in the middle of the chart fraction.