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

A glance at the line graph delineates information about the commensurability between the Chinese and US fertility rates from 1920 to 8 decades onwards.

Overall

, it can be explicitly perceived that

this

matter approximately had been halved and third for the USA's and China's populations, respectively, after undergoing some noticeable fluctuations. Enhancing from virtually 10% in 1920 to 15 per cent in 1935, China's fecundity

then

nosedived abruptly to a low amount of 5% until 1945.

This

was followed by a period of discernible escalation, with a fertile population achieving a summit of 20% in 1950. Over the latter half of the century,

however

, a significant descent of a mere 3% is exposed by

this

figure for the percentage of descendants. Concerning the other country, meanwhile, the trend went through an erratic value during the period 1920 to 1940, almost from 11 to 13%, before minimizing to just under 5% in 1945. The following five years encountered an ongoing mount somewhere in the vicinity of 15%, accompanied by a steady plunge to the end of the 20th century by the proximity of 7%.