The graph shows the change in oil production across various countries over a period of 20 years. Summarise the information by selecting and reporting the main features and making comparisons where necessary.

The bar chart illustrates the estimated amount of mass oil production in 6 Middle East Countries between 1990 and 2010, which is measured in millions of barrels per day. Overall, oil producing capacity has gradually risen to an all time high during this interval of two decades. The figure for Saudi Arabia was substantially higher […]