A glance at the cluster bar graph provided reveals the estimation of oil production capacity for six Gulf nations( Iran, Iraq, Kuwait, Qatar, Saudi Arabia, and the UAE) in each ten-year period from 1990 to 2010. The data is represented in numbers (Millions of barrels per day). Overall, the highest amount of oil was produced by Saudi Arabia in all years. In stark contrast, there was a negligible amount of oil production capacity in Qatar.
According to the survey about oil production, the highest amount of oil was produced by Saudi Arabia, with more than 14 million barrels per day. The production had increased from 8 million barrels in 1990 to 14 million barrels per day in 2010. Meanwhile, the oil production capacity in Iran remained almost the same for all years, at about 4 million barrels per day.
It is surprising that the oil manufacturing capacity of Iran, Kuwait, and the UAE industries were almost the same in each four-year period between 1990 and 2010, at about 2 million barrels in 1990. However, this had increased over the twenty years with almost double production (less than 4 million barrels per day). On the other hand, the production capacity of oil for Qatar was consistently lower, at merely 1 million barrels per day. (