The three pie charts provided illustrate the changes in annual spending by a school in United Kingdom for years 1981, 1991 and 2001.
The school spent 68% on various salaries during 1981, spending 40% on their teachers. They spent 15% on Resources and the same on Furniture and equipment.
During 1991, the expenditure on salaries increased to 72% with teachers now earning 50% of the total expense. The cost of resources also soared to 20% while furniture and equipment fell to 5%.
The final pie chart, for the year 2001, showed salaries at their lowest percent of 60, with teachers earning 45%. While furniture and equipment cost had a steep incline from 5% to 23%. Resources also fell to only 9% of total expenses. The school spent 8% on insurance, a complete contrast to 1981 (2%) and 1991 (3%)
The school consistently allocated the largest portion of its budget to salaries over the three decades. A large amount compared to their expenditure on resources and equipment for their students. The overall trend of their expenditure has remained the same during all three years.