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

The charts represent the changes once a year

by

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in

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a particular British school between 1981 and 200, measured in

percent

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per cent

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.

Overall

,

while

the three shares of experience escalated, the two others accomplished a decline.

Furthermore

, the academic staff salaries came up with the largest proportion of disbursement throughout the observation

whereas

insurance had the smallest ratio. Wages paid to the teaching staff were adjudged the most significant proportion of spending in 1981 (40%) and went up by a quarter before plunging moderately in two decades.

On the other hand

, the

non academics

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non-academics

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employee's salaries accounted for less than a third of all expenses in 1981, but their percentage plummeted significantly after 20 years (15%). The ratio of education resources was as high as furniture and equipment (15%), but a decade later the former adept a marked rise after which it halved, reaching just below 10%,

while

the latter dipped by 2/3 before rising fivefold.

Finally

,

the

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apply

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insurance had to rise marginally from 2% to 3% before jumping almost threefold in 2001.