Your essay is very good for task 1 IELTS but I still have some comments following
The following continents are Latin America and Europe which purchases 25,7 percent and 20,5 percent out of the Coca Cola's total revenue respectively.
I believe you can not say "purchase revenue". I suggest to replace purchases by accounts for.
Notwithstanding, the share price could not stabilize to mid-1997, it dropped to 60 dollars and then all of a sudden the price immensely rose from the mid-1997 to 1998 to approximately 85 dollars.
For the second graph, you wrote a lot "from...to...," therefore, for this sentence I suggest you to write "...all of a sudden the price immensely rose to approximately 85 dollars in 1998."
From that point to 2001, the share price kept declining until 2000 , however it rose insignificantly from 2000 to mid-2000 compared to its best share price which is 85 dollars.
In IELTS, compound nouns are very preferable. Therefore, I want to place a compound noun in the above sentence. "... until 2000, with an insignificant rise to 65 dollars in mid-2000"