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 three pie charts display information regarding the yearly spending of an English

school

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in 1981, 1991 and 2001.

Overall

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, the UK

school

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witnessed the largest spending on teachers’ salaries.

Furthermore

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,

while

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the expenditure on insurance raised dramatically, it was a decline in other workers’ salaries. Starting off in the early 80s the main sum of money was directed towards the teaching staff, with the second highest total dedicated to other workers. Ten years later,

while

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teachers' salaries now accounted for half the

school

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's annual budget, the same didn't apply to others, as they saw a 6% decrease in theirs.

Finally

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, by the year 2001, both professors and other workers saw a decline in their payment, with their earnings accounting for 45% and 15%, respectively. The reason for

that is

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the increasing focus on spending on furniture, equipment and insurance. The same can't be said for other resources,

such

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as books, as after starting out at 15% in 1981 and seeing an increase of 5% in the next 10 years, by 2001 they didn't even pass the 10% mark. In summary,

this

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school

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's expenses these three decades are evidently quite different from one another, as their yearly priorities seemed to change.