in central and eastern Europe enabled the three countries to adopt capitalism and democracy. In December 1991, the fall of the Soviet Union occurred, further allowing the three countries to look westward. The Visegrád Group was established on 15 February 1991 at a meeting between the President of the Czech and Slovak Federative Republic, Václav Havel, the President of the Republic of Poland, Lech Wałęsa, and the Prime Minister of the Republic of Hungary, József Antall, in the Hungarian town of Visegrád. The group was created with the aim of moving away from communism and implementing the reforms required for full membership of the Euro-Atlantic institutions, such as NATO and the EU. Economies All four nations in the Visegrád Group are high-income countries with a very high Human Development Index. V4 countries have experienced more or less steady economic growth for over a century. In 2009, Slovakia adopted the euro as its official currency, being the only member of the group to have done so. All four countries are eventually obliged to adopt the euro in the future and to join the Eurozone once they have satisfied the euro convergence criteria by the Treaty of Accession since they joined the EU. If counted as a single country, the Visegrád Group's GDP would be the 4th in the EU, 5th in Europe and 15th in the world. In terms of international trade, the V4 is not only at the forefront of Europe, but also of the world (4th in the EU, 5th in Europe and 8th in the world). Based on gross domestic product per capita (PPP) estimated figures for the year 2020, the most developed country in the group is the Czech Republic (US$40,858 per capita), followed by Slovakia (US$38,321 per capita), Hungary (US$35,941 per capita) and Poland (US$35,651 per capita). The average GDP (PPP) in 2019 for the entire group is estimated at around US$34,865. Within the EU, the V4 countries are pro-nuclear-power, and are seeking to expand or found (in the case of Poland) a nuclear-power industry. They have sought to counter what they see as an anti-nuclear-power bias within the EU, believing their countries would benefit from nuclear power. Czech Republic The economy of the Czech Republic is the group's second largest (GDP PPP of US$432.346 billion total, ranked 36th in the world). Within the V4, the Czech Republic has the highest Human Development Index, Human Capital