The given information illustrates 
the 
Japan's people by age stages beginning in 1960 and maintaining a Correct article usage
apply
predict
 to 2040
Looking from an Replace the word
prediction
overall
 perspective, It is readily apparent that 0-14 aged Linking Words
childrens
 Correct your spelling
children
are 
started from 30 in the first year, Unnecessary verb
apply
However
 it is slightly decreased since 1970 and it is predicted to be down to 10 Linking Words
in
 the end of the period.
 Change preposition
by
On the other hand
, Citizens aged between 15 to 64 Linking Words
is 
appeared just over 60 to 70 in 1970 Unnecessary verb
apply
then
 it Linking Words
is
 almost unchanged until Wrong verb form
was
following
 thirty years. Correct article usage
the following
Altough
 there is Correct your spelling
Although
noticeable
 fall Correct article usage
a noticeable
happened
 during 2000-2040.
As for remaining, Over 65 residents Correct pronoun usage
that happened
are begun
 just above 10 Wrong verb form
began
in
 the beginning of the period and over 65 aged people groups  climbed significantly to the end of the given periodChange the preposition
at