The three pie charts below show the changes in annual spending by a particular UK school in 1981, 1991, and 2001. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The pie charts illustrate how the total

expenditure

of a particular school in the UK changed in 1981, 1991, and 2001.

Overall

, it can be seen that

teachers

'

salaries

consistently took up the largest share of the budget over these years.

To begin

with, in 1981, the school allocated 40% of its budget to

teachers

'

salaries

.

While

other workers'

salaries

accounted for 28%, spending on resources

such

as books and furniture/equipment each made up 15%.

Finally

, insurance was the smallest

expenditure

at 2%.

Then

in 1991,

teachers

'

salaries

increased to 50%, making it the largest expense.

On the other hand

,

while

workers'

salaries

and spending on furniture and equipment decreased to 22% and 5% respectively, the

expenditure

on resources went up by 5%. The percentage of insurance expenses rose by a mere 1%. Shifting to the

last

graph, in 2001,

teachers

'

salaries

, though still the largest

expenditure

, declined to 45%.

Although

other workers'

salaries

went down

further

to 15%, spending on furniture and equipment increased substantially to 23%. Insurance costs

also

saw a significant rise, accounting for 8% of the total spending. Ultimately, resource costs drop sharply to 9%.