In total, Nigeria has lost 10 million barrels of oil output so far.

The state normally accounts for 25 percent of American oil output.

Until now, each country had been waiting for the other to cut its oil output first.

We simply cannot have economic growth in a situation of decreasing oil output.

This single well soon exceeded the entire cumulative oil output of Europe since the 1650s.

Saudi Arabia accounts for 12 percent of the world's oil output.

Between 1938 and 1971, Mexico's oil output expanded at an average annual rate of 6%.

More than 90 percent of the gulf's daily oil output was still closed.

The trend of falling American oil output has been apparent since the mid-1980's.

Since Friday, oil output has been cut by a total of 3.1 million barrels.