The graph below compares changes in the birth rates of China and the USA between 1920 and 2000

The graph provided reveals some striking similarities between the Chinese and us birth rates during the period from 1920 to 2000.
The first similarity is that birth rates of both nations declined over the 80-year period.
Although the two were similar in terms of a general drop, the birth rate of the USA in most years was higher than that of china.
From 1920 to 1935 period, the birth rate in America varied in a narrow range between 10 and 15, although it always remained above 10 percent.
However, in the following decade, there was a dramatic dip, followed by a significant increase to exactly 15 percent in 1950.
Since then, it has fallen more gradually, declining to 7 percent by the year 2000.
over the same period, the birth rate in china varied more significantly than in the us.
it dropped to 5 percent from 1940 to 1945 before reaching the highest point of the whole line graph, 20 percent in 1950.
By contrast, 5 years later, the birth rate in china declined rapidly by over 10 percent, falling to approximately 2 percent in 2000.