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

The charts illustrate how much a UK school spent on different running costs over a 20-year period.

Overall

, teachers’

salaries

constituted the largest

cost

to the school, and

while

spending increased dramatically for equipment and insurance, there were corresponding drops in

expenditure

on things

such

as books and on other workers’

salaries

. In all three years, the greatest

expenditure

was on staff

salaries

. But

while

other workers’

salaries

saw a fall from 28% in 1981 to only 15% of spending in 2001, teachers’ pay remained the biggest

cost

, reaching 50% of total spending in 1991 and ending at 45% in 2001.

Expenditure

on resources

such

as books had increased to 20% by 1991 before decreasing to only 9% by the end of the period.

In contrast

, the

cost

of furniture and equipment saw an opposite trend.

This

cost

decreased to only 5% of total

expenditure

in 1991 but rose dramatically in 2001 when it represented 23% of the school budget.

Similarly

Add a comma

Similarly,

show examples

the

cost

of insurance experienced a rising trend, growing from only 2% to 8% by 2001 (or: there was a rise in the

cost

of insurance).