Fig. 6
From: World trend in energy: an extension to DEA applied to energy and environment
Source: BP Statistical Review of World Energy (2014) (http://www.bp.com/en/global/corporate/about-bp/energy-economics/statistical-review-of-world-energy/statistical-review-downloads.html.)
Trend of World Oil Consumption by OECD and Non-OECD. We prepare the figure based upon the numbers listed in the data source. See Sueyoshi and Goto (2017). There was no major increase in OECD nations, but there was an increasing trend in the non-OECD nations. The result indicates that industrial nations in OECD have attained the almost maximum limit on oil consumption. In contrast, non-OECD nations have increased the consumption for their industrial developments along with a population increase in these nations.