The three pie charts show the changes in annual spending by a particular UK school in

The information below describes certain school's expenditure allocation in 1981, 1991 and 2001 years.

Major contribution to yearly spendings are attributed to teachers' salary at 40% in 1981 year, hitting its pick at 50% in 1991 year and littles slow down up to 45% in 2001 year. Other worker's salary expences are decreasing every decade from 28% in 1981 year to 15% in 2001 year. While such types of expenses as Resources, Furniture and Equipment share around 30% each representative year. And almost immaterial percetage of expenses are attributed to Insurance at 2% to 8% through the whole period.

There is a positive correlation between two categories of expenses. To illustrate, in 1981 year Resources stands for 15% and Teacher's salary for 40%, in 1991 year- 20% and 50% respectively, and in 2001 year 9% and 45% respectively as well. Another thing to mention, is that in 2001, Furniture and equipment expenses at 23% exceeded both Resourses and Other Worker's salary alltogether. While in 1991 it shared only 5% of all annual expences.

In general, Pie charts below give us information on regular types of expenses that average schools has

this is mine

The pie charts illustrate



,


,


-> in 1981, in 1991, in 2001


Teachers' salary occupied the largest part of the school's expenditure


reaching its peak


fell slightly to 45% in 2001


expense


decreased. Here you are talking about what happened in the past so past tense must be used.


This sentence is not complete.


Which two? Also, I don't think "positive" is a right word here.


accounted for


You should summarise the overall trend.
I think you should pay more attention to your grammar and remember to attach the charts next time! Hope this helps!

Where is the graph? You should have uploaded the graph using the Attach file feature because it helps us provide you with more relevant comments. :)


.... you do not talk anything about the the type of graphs. The focus should be on the what is represented by the graphs.

This sentence made me confused in term of its grammar. May you try to illustrate the line graph.
Divide this sentence into 2 sentences. It's easy for you to express your ideas.