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

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

schools

spent 40% of their income on

teachers

'

salaries

,

this

was the highest spending in 1981, followed by workers'

salaries

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

Schools

only spent 2% on

insurance

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

schools

' spending was on

teachers

'

salaries

, yet, they decreased workers'

salaries

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

increased their spending on

insurance

by 1%.

However

, in 2001, the proportion of

teachers

'

salary

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salaries

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had decreased by 5% and workers'

salaries

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

Nonetheless

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

insurance

, which had a

rateof

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rate of

8%.

To sum up

, there were some changes in

schools

' annual spending.

Nevertheless

, most spending was on

teachers

'

salaries

and they had the least spending on

insurance

.