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

The given charts provided information concerning the alterations in

yearly

Correct article usage

the yearly

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costs of a special school in Britain over the course of three years; 1981, 1991, and 2001.

Overall

, throughout the given period, the most and the least significant sources of expenditure were related to the teachers' salaries and insurance, respectively. It can be clearly seen that

,

Remove the comma

apply

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more or less

a

Correct article usage

apply

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half part of the school budget had been allocated to teachers' salaries over the period recorded.

In contrast

,

insurance

Correct article usage

the insurance

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part occupied altogether just 13% of the financial budget in three years; constituting 2% in 1981, 3% in 1991, and 8% in 2001. The cost

for

Change preposition

of

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resources

such

as books

that

Correct pronoun usage

apply

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comprised 15% of the spending in the first year faced an upward trend and reached 20% in 1991.

However

, in the

next

ten

years

Add a comma

,years

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the expenses of

this

sector declined to just under one in ten.

In contrast

, the budget

of

Change preposition

for

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furniture and equipment at first

was

Unnecessary verb

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reduced to one-

third

of its previous one (from 15% in 1981 to 5% in 1991) and

then

rose dramatically to 23% in 2001. Regarding the costs of other workers' salaries, it encountered a fall from 28% in 1981 to just 15% of the expenses in 2001.