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

The pie charts compare how much money a

school

in the UK spent on different categories every year during the period from 1981 to 2001.

It is clear that

the teachers' salaries took up the largest percentage of the whole spending,

while

the opposite was true for the insurance.

Besides

, there was an upward tendency in the expenditure on the trainers' wages, insurance services

as well as

furniture and equipment,

whereas

the figure for the

school

resources and other staff's income decreased significantly throughout the years. As can be seen, the money used on payment for professors was recorded to be at the top of the list. It was 40% in 1981 and rose to half of the whole spending in 1991 before dropping again to 45% in 2001.

In addition

, The

school

paid more attention to the facilities as the fraction of furniture and equipment climbed from 15% in 1981 to nearly a quarter in 2001 after a considerable decline in 1991. Insurance rose from just 2% to 8% during the observed time as well.

By contrast

, resources of the

school

such

as books were cut noticeably. It comprised 15% in 1991 and soared to 20% in the next decade but ended up at only 9% in 2001.

Likewise

, the salaries for other workers

also

witnessed a reduction. It made up 28% at the beginning of the period, yet

then

stood at 15% in the

last

year.