the pie charts below compare the changes in annual spending by a particular UK school in 1981, 1991 and 2001

The pie chart depicts the results of a survey carried out to determine the changes in the

proportion

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of budget spent by a school in the UK in three dissimilar years. As transparent from the data, it is notable that teachers’ salaries made up the largest

proportion

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of the school’s expenditure in all three years (1981, 1991, and 2001). In striking contrast, insurance showed a stark contrast to taking up the smallest percentage. In 1981, around 40% of the school’s budget was spent on teachers’ salaries.

This

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figure rose slightly to 50% in 1991 but fell again to 45% in 2001. Expenditure on other workers’ salaries dipped gradually over the 20-year period, from 28% to only 15% in 2001. Another aspect is the

proportion

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of the school's budget spent on insurance was only 2%.

However

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, the figure quadrupled to 8% in 2001. The percentage of spending on resources and furniture and equipment experienced a period of erratically. By far the highest

proportion

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of resources is clearly evident at 20%, whilst the figure for furniture and equipment reached a peak of 23% in 2001.