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

The graphs show the amount of change in annual expenditure by a particular school in England in three separate years, 1981, 1991 and 2001.

Overall

, the largest proportion of total school expenditures was allocated to teacher

salaries

in 1991,

while

that of insurance expenses was the lowest in 1981.Between 1981 and 2001, there was a significant decrease in costs related to

resource

Change the noun form

resources

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such

as books and other workers'

salaries

. In all three years, the greatest expenditure was

for

Change preposition

on

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the

salaries

of instructors and it reached its peak, which is 50%, in 1991. But

while

, in 1981, 28% of total school expenses were paid for

salaries

of other workers, over the following 20 years, that of workers

salaries

fell dramatically (15%). Despite the fact that the cost of resources

such

as books had risen to 20% by 1991, it was only 9%

at the end

of the period. In 1991, furniture and equipment expenditures went down only a very small number of total expenditures and more than quadrupled in 2001.

Similarly

, the cost of insurance saw a rising trend, growing only 2% to 8% by 2001.