The graph illustrates the estimated oil produced by several gulf countries (Iran, Iraq, Kuwait, Qatar, Saudi Arabia and UAE) between the years 1990 and 2010.

The graph illustrates the estimated oil produced by several gulf countries (Iran, Iraq, Kuwait, Qatar, Saudi Arabia and UAE) between the years 1990 and 2010, and it is measured in millions of barrels per day. Overall, it can be said that the oil production capacity increased in all six countries over the 20-year period of time and only Qatar showed slight difference. From the graph, we can obviously notice that Saudi Arabia surpassed all other countries with the highest rate in all 20 years, starting at about 8. 2 and significantly reaching at the peak of over 15 millions of barrels per day by 2010. Meanwhile, the other three countries- Iran, Iraq and Kuwait - showed nearly the same gradual rise in the years, which is around 1. 5 in total by the end of 2010. UAE, however, remained static at about 2. 2 from 1990 to 2000, and then witnessed a steady increase for the next ten years, rising up to nearly 4 in 2010. Qatar is the only country which showed mild fluctuations in the trend and possessed the lowest rate of below 1 throughout the years, only reaching its maximum point of 0. 8 in 2000, and then falling to around 0. 5 by 2010 which is nearly the same as its starting point in 1990.