The three pie charts illustrate how the yearly expenditure of a certain school in the UK changed between 1981,1991, and 2001. The figures are measured in percentages.
Overall, the money spent on salaries of teachers remained highest, while insurance spendings made the least share throughout the period. Notably, furniture and equipment overtook the second leading position of other employees’ salaries, showing a dramatic reversal.
Regarding the outgoing on salaries, teachers’ salaries accounted for 40 in 1981 and kept its leading position, rising modestly to 50 and falling to 45 in 1991 and 2001, respectively. In contrast, money spent on salaries of other staff decreased gradually with a stability: it first witnessed a slight decline from 28 to roughly one-fifth , still ranking second, and then dropped to 15, giving up its rank by the end of the period.
As for the remaining categories, resources as well as furniture and equipment started at 15 in 1981, fluctuating over three timeframes. From then on, 1991 saw a significant dip in furniture and equipment to one in twenty, which climbed dramatically to nearly a quarter over the following decade, overtaking the second place. Resources such as books, at the same time, had registered an increase of 5 in 1991 before plummeting to 9 in the end. Meanwhile, the outlay on insurance quadrupled, shifting from 2 to 3 and 8 in the next twenty years, yet stayed as a least budget-consuming category.