I am come from Viet Nam, hoping everyone help me correct task

Test1:

The line graph gives information about the birth rates in China and the USA and how these rates changed within 80 years from 1920 to 2000.

Overall, the birth rates of both nations decreased during the reseached period. Although there were similar in term of a decline in two trend, the birth rate of US is higher than that of China in most years.

In the 1920-1935 period, the USA birth rate fluctuated slightly although it always remain above 10%. However, in the following decate, the birth rate of USA experienced a rapid drop to under 5%. During the 1950s, the figure for US climbed dramatically to 15%, which is the highest point during the 80-year period. There was a gradual decline to 2% at the end of the period shown.

Over the same period, the birth rate in China varied more significantly than in the US. It dropped by over 5% from 1920 to 1940 before reaching the highest point of the Whole line graph, 20% in 1950. By contrast, 5 years later, the China birth rate dropped sharply by over 10%, falling gradually to approximately 2% in 2000.