The graph illustrates the number of visitors to four international museums from 1980 to 2015. Each point represents two 
million
 Use synonyms
people
 intervals for the particular year, and there are several key features which are set out below. 
Use synonyms
First, 
there was one international Linking Words
museum
 that experienced an upward Use synonyms
trend
. Use synonyms
Vatican
 Correct article usage
The Vatican
Use synonyms
museum
 started Capitalize word
Museum
at 
five Change preposition
apply
million
 Use synonyms
people
 in 1980 and ended with nine Use synonyms
million
 Use synonyms
people
 in 2015, making Use synonyms
Vatican
 one of the most visited Correct article usage
the Vatican
Use synonyms
museum
. 
Fix the agreement mistake
museums
Second, 
there was one international Linking Words
museum
 that experienced a downward Use synonyms
trend
. London Science Use synonyms
Museum
 started at four Use synonyms
million
 Use synonyms
people
 Use synonyms
at
 1980 and it decreased to two Change preposition
in
million
 Use synonyms
people
 Use synonyms
at
 2015. 
Change preposition
in
Lastly
, there were two international Linking Words
Use synonyms
museum
 that experienced a Change to a plural noun
museums
fluctuated
 Replace the word
fluctuating
trend
. Shenzhen visitors started at three Use synonyms
million
 Use synonyms
people
 and went up to four Use synonyms
million
 Use synonyms
people
. The second Use synonyms
museum
 that experienced Use synonyms
Correct article usage
a fluctuated
fluctuated
 Wrong verb form
fluctuating
trend
 is Use synonyms
Louvre
 Correct article usage
the Louvre
Use synonyms
museum
, which started Capitalize word
Museum
at
 eight Change preposition
with
million
 Use synonyms
people
 and ended with nine Use synonyms
million
 Use synonyms
people
. 
In conclusion, throughout the Use synonyms
35 years
 period, Louvre and Vatican Correct your spelling
35-year
museums
 had the most visitors compared to other international museums.Capitalize word
Museums