Bar Graph Showing Estimated Oil Capacity of Six Countries, In Millions of Barrels Per Day, From 1990 to 2010 IELTS Writing Task 1

When compared to the combined oil production of the other five countries, its daily output surged to well over 14 million barrels. After two decades, it was produced in quantities of up to 15 million per day. It is important to note that Saudi Arabia's oil reserves were roughly comparable to those of the other nations taken as a whole. Around 2-3 million barrels per day of oil were produced in Iran, Iraq, Kuwait, and the UAE in 1990. It is approximately the same as today. In 2010, their production capacity increased to approximately 4 million barrels over the course of many years. Iran's production was just a little bit more than that of Iraq, Kuwait, and the United Arab Emirates. Less than 1 million barrels of oil were produced in Qatar in 1990, and this capacity remained constant there until 2000 when it slightly increased. This was the lowest quantity of oil production that was recorded.

While Iran generated three and Kuwait and Qatar generated less than two million barrels. With a daily production of more than 8 million barrels in 1990, Saudi Arabia was the world's top oil producer. Its daily output soared to well over 14 million barrels when compared to the total oil output of the other five nations. Except for the UAE, whose production stayed the same as it had a decade earlier, other countries saw an increase in oil production after ten years. In 2005, every country with the exception of Qatar continued its trend of increased oil output. Finally, in 2010, Iran produced more than 4 million barrels per day, while production in Iraq, Kuwait, and the UAE was close to 4 million barrels per day. As it did in each of the above years, Saudi Arabia produced far more oil than the other Gulf nations in 2010, which was close to 15 million barrels per day.

Increased to 4 million after 15 years, and eventually, the production slightly increased in 2010. Iraq's ability to produce oil was inferior to Iran's, and its daily oil production peaked in 1990 at almost 2 billion barrels, virtually tripling by 2010. Kuwait, on the other hand, produced fewer than 2 billion barrels per day and 3.5 million barrels in total in 2010. Furthermore, Qatar produced the least amount of oil over the years—roughly 0.5 million barrels per day—and its output level stayed the same after 20 years. The United Arab Emirates' oil output peaked in 2010 at approximately 4 million barrels per day, following a pattern similar to that of Iraq. Last but not least, Saudi Arabia had the highest and most significant rate of oil production compared to other nations. It produced more than 8 million barrels per day in 1990, which was around four times more than what other nations produced. Its daily output increased to well over 14 million barrels, which was nearly equal to the total oil production of the other five nations.