After 2000, the Baltic Tiger economies implemented important economic reforms and liberalisation, which, coupled with their fairly low-wage and skilled labour force, attracted large amounts of foreign investment and economic growth. Between 2000 and 2007, the Baltic Tiger states had the highest growth rates in Europe. In 2006, for example, Estonia grew by 10.3% in gross domestic product, while Latvia grew by 11.9% and Lithuania by 7.5%. All three countries by February 2006 saw their rates of unemployment falling below average EU values. Additionally, Estonia is among the ten most liberal economies in the world and in 2006 switched from being classified as an upper-middle income economy to a high-income economy by the World Bank. All three countries joined the European Union in May 2004. Estonia adopted the Euro in January 2011, Latvia in 2014 and Lithuania entered the Eurozone in 2015.