The below pie charts illustrate the variations in the annual spending made by a specific school in three years starting from 1981 which are differed by ten years.
Overall, majority of the total school spending was made on teachers' salaries in 1981, 1991 and 2001 whereas least amount of spending was made on Insurance in 1981, 1991 and 2001.
Teachers’ salaries accounted for 40%, 50% and 45% in 1981, 1991 and 2001 respectively. Insurance comprised 2%, 3% and 8% of total school spending. Other workers’ salaries made up of above a quarter in 1981 and below a quarter in 1991 whereas below one fifth in 2001.
Furniture and Equipment constituted 15% in 1981, 5% in 1991 and 23% in 2001 for the total spending made by the school. Spending made on resources was below one fifth in 1981, one fifth in 1991 and below one tenth in 2001.