Evaluating energy security performance from 1990 to 2010 for eighteen countries

► This study provides an index for evaluating national energy security policies and performance. ► The top three performers of our index for all data points and times are Japan, Brunei, and the United States. ► The worst performers are Vietnam, India, and Myanmar. ► Malaysia, Australia, and Brunei saw their energy security improve the most from 1990 to 2010. ► Laos, Cambodia, and Myanmar saw it decline the most from 1990 to 2010.