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

The pie charts represent the proportion of the UK

schools

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' spending in several sectors in three decades starting from 1981 to 2001. In 1981,

schools

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spent 40% of their income on

teachers

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'

salaries

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,

this

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was the highest spending in 1981, followed by workers'

salaries

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, which were 28%. They only spent 15% on books, furniture, and equipment.

Schools

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only spent 2% on

insurance

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, which was the lowest spending among other sectors. A decade later, half of the

schools

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' spending was on

teachers

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'

salaries

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, yet, they decreased workers'

salaries

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to 22%. The percentage of spending on books increased to 20%. On the other side, the spending on furniture and equipment had declined by 10%. The

schools

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increased their spending on

insurance

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by 1%.

However

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, in 2001, the proportion of

teachers

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'

salary

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salaries

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had decreased by 5% and workers'

salaries

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by 7%. Spending on resources had declined by 11%.

Nonetheless

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, spending on furniture and equipment had drastically increased to 23%. There was a slight increase in

insurance

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, which had a

rateof

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rate of

8%.

To sum up

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, there were some changes in

schools

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' annual spending.

Nevertheless

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, most spending was on

teachers

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'

salaries

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and they had the least spending on

insurance

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.