Any grammar mistakes? The three charts show the changes of spending of a particular UK school in three years, 1981, 1991 and 2001.  In these three years, the stuff salaries accounted for a large amount of total school spending. The percentage of teachers' salaries had a rise from 40% in 1981 to 50% in 1991, and then had a decrease to 45% in 2001. However, the overall trend of other workers' salaries tended a sharply decrease from 28% in 1981 to 15% in 2001. The percentage of resources, for example, books, accounted for 15% in 1981, had a increasing trend to reach 20% in 1991 while it reduced to 9% in 2001. However, the percentage of furniture and equipment had a opposite trend. It declinal from 15% in 1981 to 5% in 1991, and then grew to 23% in 2001. As for percentage of insurance, It had a general increasing trend, reached 3% in 1991 and 8% in 2001 respectively. In conclusion, the teachers' salaries accounted for about half of the total school spending and maintain steady between 1981 and 2001. School spent more money in its equipment and insurance while decreased much money from other workers' salaries and resources.