South Korea's highly enviable academic performance has persuaded British education ministers to actively remodel their own curriculums and exams to try to emulate Korea's militant drive and passion for excellence and high educational achievement. Former U.S. President Barack Obama has also praised the country's rigorous school system, where over 80 percent of South Korean high school graduates go on to university. The nation's high university entrance rate has created a highly skilled workforce, making South Korea among the most highly educated countries in the world with one of the highest percentages of its citizens holding a tertiary education degree. In 2017, the country ranked fifth for the percentage of 25 to 64 year old's that have attained tertiary education with 47.7 percent. In addition, 69.8 percent of South Koreans aged 25–34 have completed some form of tertiary education qualification, and bachelor's degrees are held by 34.2 percent of South Koreans aged 25–64, the most in the OECD.