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

Three pie charts demonstrate the percentages of money spent by a school in the UK, in the years 1981, 1991, and 2001.

Overall

it can be seen that the highest percentage of all expenditures in all three years was allocated for teachers' salaries,

while

the least was for the purpose of insurance.

To begin

with, during

this

period, approximately half of the spending was on payments to teachers at 40% in 1981, 50% in 1991, and 45% in 2001.

Furthermore

, around one-fourth of the money was distributed for other workers' salaries in 1981 and 1991,

although

it dropped to 15% in the

last

year. In 1981, a similar percentage of finance was given for resources and types of furniture and equipment at 15%.

However

, the figure for books increased by 5% in 1991 and again dropped by around half in 2001,

while

the number for equipment, decreased drastically by 10% in 1991, and again rose up to 23% in 2001.

Finally

, the money for insurance was never increased by more than 10% throughout the period.