The three charts below show how the changes in annual spending by a particular UK schools in 1981, 1991, and 2001

The pie charts compare the expenditure of a school in the UK in three different years over a 20-year period. Looking from an

overall

perspective, it is readily apparent that teachers' salaries made up the largest proportion of the school's spending in all three years (1981, 1991, and 2001).

By contrast

, insurance was the smallest cost each year. A deep analysis of the pie charts provided reveals that in the year 1981, 40% of the school's budget went into teachers' salaries.

This

figure rose to 50% in 1991

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but fell again by 5% in 2001. It can

also

be seen that other workers' wages saw a sharp decline over a period of 20 years, from 28% in 1981 to roughly 15% in 2001. Looking at the chart in more detail, the percentage of insurance stood at only 2% in1981

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but reached 8% in 2001.

Moreover

, expenditure on resources, furniture and equipment experienced a considerable fluctuation. The figure for resources was highest in 1991, at 20%,

while

the proportion of spending on furniture and equipment reached its peak at 23% in the year 2001.