Economie Performance Research shows a direct correlation between the English skills of a population and the economic per formance of the country Indicators like gross national income (GNI) and GDP go up in our latest edi tion of the EF English Proficiency Index (EF EPI), the largest ranking of English skills by country, we found that in almost every one of the 60 countries and territories surveyed, a rise in English proficiency was connected with a rise in per capita income. And on an individual level, recruiters and HR managers around the world report that job seekers with exceptional English compared to their country's level earned 30-50°. percent higher salaries mmary:​