The line chart illustrates the portions of Australian exports to 4 different countries from 1990 to 2012. At first , we can divide the four countries into two groups: the first one contains Japan and China, with the 
most
 percentage of ships, Correct word choice
highest
while
 the second group involves the US and India with the lowest portion of sales. 
Linking Words
Firstly
, the Linking Words
comparing  
in the first band. China had a strong rise during the period of the study, reaching a peak Replace the word
comparison 
with
 30 %, Change preposition
of
although
 Japan decreased from 1990 to 2012, having a slowdown Linking Words
with
 18% in 2012.
Change preposition
of
Secondly
, it can be seen that the US shows a peak in 2000 with 12 % of exports. India had an increase between 1990 and 2010, Linking Words
Linking Words
however
 showed a decline in the Add a comma
however,
last
 years.
In the end, the diagram shows the changes in the percentage of Australian exports in four different countries.Linking Words