The given pie charts provide information about the changes in school expenditure across five categories in a particular school over the years 1981, 1991, and 2001.
Overall, it is clear that the school consistently spent the largest portion of its budget on teachers’ salaries, while insurance remained the smallest area of expenditure throughout the given years.
In terms of teachers’ salaries, the school allocated 40% of its budget to this category in 1981, which increased to 50% in 1991, and slightly reduced to 45% by 2001, reflecting the consistent priority placed on teacher compensation. In contrast, spending on other workers’ salaries experienced a steady decline, dropping from 28% in 1981 to 15% by 2001.
Regarding furniture and equipment, the school spent 15% of its budget on this in 1981, but this figure decreased significantly to 5% by 1991. However, by 2001, spending on furniture and equipment had risen sharply to 23%, showing a renewed focus on physical resources. Meanwhile, insurance, which started at just 2% of the budget in 1981, increased to 8% by 2001, although it still represented the smallest expenditure category.