Explanation

The United States is the largest oil producer, followed closely by Saudi Arabia and Russia.

Canada is also a significant oil producer, with the majority of its production coming from the oil sands in Alberta.

United States: 18.60 mb/d

Saudi Arabia: 11.01 mb/d

Russia: 10.50 mb/d

Canada: 5.29 mb/d

Additional information

OPEC had its headquarters in Geneva, Switzerland, in the first five years of its existence.

This was moved to Vienna, Austria.

It was founded on September 1, 1965.