The given pie charts show how much a UK school spent on different running costs in three separate years: 1981, 1991 and 2001.
Overall, the expenditure on teachers’ salary were significantly more than that of insurance. By contrast, the total of resource e. g. books and Furniture and equipment showed a extremely similar data through three years. Besides, a continuous decrease can be seen in Other workers’ spending.
It is noticed that there was a stable increase in the figure for teachers’ salary, which approximately accounted for half of the total school spending, at 40%, 50% and 45% respectively. In contrast, although a rise took place in insurance, the changes was far less significant, with the figure slightly ascending by merely 6%, growing from 2% to 8% by the end of 2001.
The data about other Resource e. g. books and furniture and equipment were similar, with the average at 43. 5%. The largest spending of former occurred in 1991 and then dropped to the bottom at 9% while the percentage of former reached a high point in 2001 at 23%. Others workers’ salaries played less and less important role, declining by 13%. 
The  
given
 pie charts  
show
 how much a UK school spent on  
different
 running costs in three separate years: 1981, 1991 and 2001. 
Overall
, the expenditure on teachers’ salary were  
significantly
 more than that of insurance. By contrast, the total of resource  
e. g.
 books and Furniture and equipment  
showed
  a
  extremely
 similar data through three years.  
Besides
, a continuous decrease can be  
seen
 in Other workers’ spending.
It  
is noticed
 that there was a stable increase in the figure for teachers’ salary, which approximately accounted for half of the total school spending, at 40%, 50% and 45%  
respectively
.  
In contrast
, although a rise took place in insurance, the  
changes
 was far less significant, with the figure  
slightly
 ascending by  
merely
 6%, growing from 2% to 8% by the  
end
 of 2001.
The data about other Resource  
e. g.
 books and furniture and equipment were similar, with the average at 43. 5%. The largest spending of former occurred in 1991 and then dropped to the bottom at 9% while the percentage of former reached a high point in 2001 at 23%. Others workers’ salaries played less and less  
important
 role, declining by 13%.