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.

A glance at the pie charts delineates statistics about the commensurability of annual expenditure by an unnamed British school in 1981, 1991 and 2001.

Overall

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, it can explicitly be perceived that teachers' salaries account for the main school outlay for these three

years

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,

whereas

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insurance was the minority. The values of the others, furniture and equipment, other workers' salaries and

resources

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, fluctuated during these

years

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. Looking into more details in the illustrations related to 1981 and a decade later, tutors' income was predominantly among the whole parameters, at 40% in 1981 and

then

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rose to 50% in 1991. The

second ranking

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second-ranking

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was allocated to workers' wages, approximately one-fourth for both

years

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. The budget for

resources

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such

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as books was considered a tertiary priority, taking 15% and 20% in 1981 and 1991, respectively. As much as the same proportion of

resources

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was spent on necessary tools and amenity facilities in 1981,

while

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this

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item was relatively low at 5 per cent in 1991. Insurance, the lowest amount, was roughly the same in these couple

years

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, to somewhere in the vicinity of 3%. With regard to total spending in 2001, meanwhile, teachers earned distinguishedly just under half of that, the highest similar to 1981 and 1991. Unlike in the previous period, the finance for furniture and equipment increased to 23%. Over a downward trend, workers' salaries saw a moderate decline of 15%.

This

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was followed by

resources

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, by 9%, and a nearly equal percentage of that for insurance.