The spectacular rise in ‘Saudi America’s’ oil output in just 4 years to a 21-year high is nothing short of phenomenal

The spectacular rise in ‘Saudi America’s’ oil output in just 4 years to a 21-year high is nothing short of phenomenal | AEIdeas:
"Almost entirely due to the breakthrough drilling technologies of hydraulic fracturing and horizontal drilling that started accessing oceans of shale oil in North Dakota and Texas toward the end of 2008 (see arrow in chart), US oil output has increased by 46.5%, from about 5 million bpd in early 2009 to now more than 7.3 million bpd. "