The diagram displays the changes in food consumption by Chinese people between 1985 and 2010.
The graph concerns 
interval
 between 1985 and 2010, the minimum consumption was meat Correct article usage
the interval
at
 1985 and Change preposition
in
maximum
 was fish Add an article
the maximum
at
 2010.
Fish was Change preposition
in
most
 consumed food and Correct article usage
the most
on
 the 15 years graph Change preposition
in
flactuated
 between 600 and 700 Correct your spelling
fluctuated
fluctuates
fluctuate
grams
 but Use synonyms
further
 rose gradually, meat Linking Words
by comparison
 with fish did not rise that high than 200 Linking Words
grams
, Use synonyms
Correct article usage
the meats
meats
 graph rose slowly during that 25 years.
People Change the noun form
meat
consumption
 less and less salt, consum of salt Replace the word
consume
fall
 steadily in that 25 years from 500 Replace the word
fell
grams
 Use synonyms
on 
Change preposition
apply
the
 week to 200 Correct article usage
a
grams
 Use synonyms
on 
Change preposition
apply
the
 week.Correct article usage
a