Hi everyone,
This is my work on an IELTS Writing Task 1 thread. Please help me assess the writing. You can point at the grammar errors, vocabulary disorders and misunderstandings, or anything that can probably lower my IELTS Writing score. Finally, please show an IELTS Writing score which is, in your opinion, closest to my work.
I will be really grateful for your helps.
Thank you.

(the task has been given as a JPEG image file attached to this article)

(below is my writing)

The bar chart illustrates the amounts of oil produced by six countries during the period from 1990 to 2010.

At first glance it is clear that the productivity of most of the nations gradually increased over time, except for Qatar’s figure fluctuating throughout the given period.

From 1990 to 2010, Saudi Arabia had the highest quantity of oil produced among six given countries, with the figure in 1990 and 2010 was around 8.5 and 14.5 million barrels per day respectively. There is a surge in Saudi Arabia’s 2000 and 2005 figure, when the amount of oil produced sharply jumped from just over 9 million to about 12 million of barrel per day. This nation also held the highest growth rate comparing to the other five countries, with 6 million of barrel over two decades.

Iran, Iraq, Kuwait and UAE shared a same steady rise in common, from about 2 million to 4 million barrels during this period. Qatar’s quantity, however, far different from other countries with the top figure is nearly 1 million of barrel per day in 2000. This nation also witnessed a fluctuation of oil production capability throughout the period.

Please help me assess my Task 1 writing (grammar errors, vocabulary disorders, misunderstandings,...), and if you can, please give an IELTS Writing band score that fits this work. Thank you so much.


OIL PRODUCTIVITY


The bar chart illustrates the amounts of oil produced by six countries during the period from 1990 to 2010.

At first glance it is clear that the productivity of most of the nations gradually increased over time, except for Qatar’s figure fluctuating throughout the given period.

From 1990 to 2010, Saudi Arabia had the highest quantity of oil produced among six given countries, with the figure in 1990 and 2010 was around 8.5 and 14.5 million barrels per day respectively. There is a surge in Saudi Arabia’s 2000 and 2005 figure, when the amount of oil produced sharply jumped from just over 9 million to about 12 million of barrel per day. This nation also held the highest growth rate comparing to the other five countries, with 6 million of barrel over two decades.

Iran, Iraq, Kuwait and UAE shared a same steady rise in common, from about 2 million to 4 million barrels during this period. Qatar’s quantity, however, far different from other countries with the top figure is nearly 1 million of barrel per day in 2000. This nation also witnessed a fluctuation of oil production capability throughout the period.

The bar chart illustrates the amounts of oil produced by six countries during the period from 1990 to 2010. (Which countries? Which time points? -- It is not a line graph! WHat are the units of measurement? Your first paragraph is not complete.)

At first glance it is clear that (That does not do anything to describe the figure. Also words like "clear, obvious, evident, and notable" are opinion words. Do not write any opinions or conclusions in Task 1) the productivity of oil produced by most of the nations gradually increased over time, except for Qatar’s figure fluctuating (Wrong words. A figure, in this context, is a diagram or table inserted into the article. Avoid "figure" to refer to data values. Fluctuation cannot be observed in bar charts. There are not enough data points. See below for an explanation of "fluctuate." Use "vary/variation") throughout the given period.

From 1990 to 2010, Saudi Arabia had the highest quantity of oil produced among the six given (What are the countries? You still have not told the reader.) countries, with the figure in 1990 and 2010 was around 8.5 and 14.5 million barrels per day respectively. There is a surge in Saudi Arabia’s 2000 and 2005 figure, when the amount of oil produced sharply jumped from just over 9 million to about 12 million of barrel per day. This nation also held had the highest growth rate comparing compared to the other five countries, (What are the countries? You still have not told the reader.) with 6 million of barrel (wrong expression) over two decades.

Iran, Iraq, Kuwait and UAE shared a same steady rise in common, from about 2 million to 4 million barrels during this period. Qatar’s quantity, however, far different from other countries with the top figure is nearly 1 million of barrel per day in 2000. This nation also witnessed a fluctuation (Do not use anthropomorphic verbs -- see, witness, experience -- in Task 1. They are not mathematical or scientific terms.) of oil production capability throughout the period.


Vocabulary: Fluctuation.

Fluctuation is a rather rapid variation of data values relative to a trend. You can only see fluctuation on line graphs. Fluctuation can be random or cyclical. Fluctuation can be due to "noise" in the data (figure 2 below) or have a real underlying cause (figure 1 below). Financial data (buying/selling) often shows fluctuation (figure 3 below), but there are underlying trends.



Site Hint: Check out our list of pronunciation videos.

Thank you for your clear and thoughtful explanation. I will try my best to perform better the next time. I wish I could receive more of your assessments in the future.

Thank you, sir.