First of all, the diagrams provide data on the distribution of supporters across different types of organizations in 2008 and 2014. The changes in trends are presented in percentages.
the pie charts give information about the changes in annual spending by a particular UK school in 1981,1991 and 2002. Overall, the Teachers' salaries were the main part of their costs.
The supplied pie charts illustrate schools’ spending in three various years (1981, 1991 and 2001) throughout 2 decades in the UK. Units are measured in percentage.