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

The graph provided the changes in the fertility rates of China and the USA from 1920 to 2000.
At the first glance, the levels of the two nations fluctuated considerably, but the lower rate of China was witnessed at the beginning and the end of the period.
In greater detail, from the higher proportions in 1920, the USA's birth rate rose to 13 percent in 1935, while the figure for China was 15 percent. What stands out is both countries experienced a downward trend afterwards then plunged to a low of only 5 percent.
Meanwhile, an upward trend was observed in 1950, not only did China's levels reach a peak of 20 percent, but the USA's figures showed an exponential climb, to somewhere in the vicinity of 15 percent. What jumps out is a sustained decline was noticed in the latter half of the century, when a three-fold was witnessed in the USA's fertility rates compared with the figure of China at the end of the period.