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.

Three charts compare how the annual expenditure changed in a specific British school in the years 1981, 1991 and 2001.

Overall

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, it is apparent that the teaching staff's salaries always accounted for the highest proportion of total funding over the shown period, whilst the lowest quantity of money was spent on insurance. It is worth noticing that the expenditure on other employees' salaries ranked second in the total budget in 1981 and 1991, but was overtaken by the money used for certain facilities, including furniture and other equipment.

Additionally

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, an exponential increment could be seen in the funding for those facilities where the figures increased from 5% in 1991 to 23% in 2001, even though the percentage of

this

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part decreased in previous years (falling from 15% in 1981 to 5% in 1991). The proportion of total school spending allocated to learning materials declined from 15% to 9% with some fluctuation, as in 1991, the amount of expenditure on studying resources occupied 20%. Simultaneously, the percentage of money spent on educators' salaries remained relatively stable, which grew from 40% in 1981 to 50% in 1991 but ended up at 45% in 2001.