The three pie charts below show the changes in annual spending by a particular UK school in 1981, 1991 and 2001.

The three pie charts illustrate the proportions of annual spending by a particular UK school in the

year

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years

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1981, 1991 and 2001. Teachers'

salaries

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and other workers'

salaries

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always account for the largest

proportion

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, reflecting that employee

salaries

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are the main expense. The

proportion

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of other expenses has changed in all three years, but their

overall

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proportion

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has always been lower than employee salary expenses. The

proportion

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of Teachers'

salaries

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witnessed a

significantly

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significant

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increase, peaking in 1991 at 50%.

However

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, there was a drop in the percentage of Teachers'

salaries

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to 45% in 2001.

By comparison

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, other workers'

salaries

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steadily decreased from 25% in 1981 to 12% in 2001. In 1981, the

proportion

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of resources and

fumiture

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furniture

and equipment was both 15%. In 1991, the

proportion

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of resources reached its highest

proportion

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,

while

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the

proportion

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of

fumiture

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furniture

and equipment was the opposite.

However

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,

In

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in

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2001, their situation was completely opposite.

In contrast

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, the

proportion

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of insurance accelerated its growth to a maximum of 8% in 2001.