the graph 
show
 us the Change the verb form
shows
different
 in the rate of new-born in Replace the word
difference
China
 and Use synonyms
Use synonyms
Change the capitalization
America
america
 from 1920 to 2000
Change the capitalization
America
Overall
,Linking Words
Use synonyms
america
 are Change the capitalization
America
Americans
showed
 to Wrong verb form
shown
had
 the rates dominated all the time Wrong verb form
have
while
 Linking Words
China
 had the highest birth rates in the whole graph at one point
Looking Use synonyms
in
 the first 30 Change preposition
at
years
, it can be seen that both countries Use synonyms
had 
fluctuated a bit and experienced a downfall and a climax during Unnecessary verb
apply
this
 period.Linking Words
In addition
, Linking Words
America
's birth Use synonyms
rates
 Fix the agreement mistake
rate
had 
dropped to 5% in 1945 but quickly recovered to 15% within 5 Unnecessary verb
apply
years
.Use synonyms
Moreover
,Linking Words
China
 had its proportion fall to 5% from 1940 to 1945 and skyrocket to 20% in 1950, as twice as much as from the beginning
Use synonyms
However
, from that moment to the end of the graph, 2 nations have shown an opposite side from the first 30 Linking Words
years
 when the proportion fell significantly.Use synonyms
While
 Linking Words
America
 witnessed a slight fall through the Use synonyms
years
 and reached 7% in 2000.Use synonyms
China
, Use synonyms
on the other hand
, falls significantly to 2 % in the Linking Words
50 year
 period.Add a hyphen
50-year