Huh?
How is that figured?
The first chart there shows Texas PLUS N.D. barely catching up to the rest of the U.S.
So, how could it be topping the #2 country?
The #2 OPEC member oil producing country is Iran.
They currently produce 3.33 MMBPD.
http://www.opec.org/opec_web/static_files_project/media/downloads/publications/MOMR_June_2014.pdf
Page 56
Texas is producing 3.01 MMBPD.
North Dakota is producing 1.00 MMBPD.