Economist reported Romania again enjoying "booming" economic growth at 4.1% that year, with wages rising fast and a lower unemployment than in Britain. Economic growth accelerated in the midst of government liberalisations in opening up new sectors to competition and investment—most notably, energy and telecoms. In 2016, the Human Development Index ranked Romania as a nation of "Very High Human Development". Following the experience of economic instability throughout the 1990s, and the implementation of a free travel agreement with the EU, a great number of Romanians emigrated to Western Europe and North America, with particularly large communities in Italy, Germany, and Spain. In 2016, the Romanian diaspora was estimated to be over 3.6 million people, the fifth-highest emigrant population in the world. Geography and climate Romania is the largest country in Southeastern Europe and the twelfth-largest in Europe, having an area of . It lies between latitudes 43° and 49° N and longitudes 20° and 30° E. The terrain is distributed roughly equally between mountains, hills, and plains. The Carpathian Mountains dominate the centre of Romania, with 14 mountain ranges reaching above —the highest is Moldoveanu Peak at . They are surrounded by the Moldavian and Transylvanian plateaus, the Carpathian Basin and the Wallachian plains. Romania is home to six terrestrial ecoregions: Balkan mixed forests, Central European mixed forests, East European forest steppe, Pannonian mixed forests, Carpathian montane conifer forests, and Pontic steppe. Natural and semi-natural ecosystems cover about 47% of the country's land area. There are almost (about 5% of the total area) of protected areas in Romania covering 13 national parks and three biosphere reserves. The Danube river forms a large part of the border with Serbia and Bulgaria, and flows into the Black Sea, forming the Danube Delta, which is the second-largest and best-preserved delta in Europe, and a biosphere reserve and a biodiversity World Heritage Site. At , the Danube Delta is the largest continuous marshland in Europe, and supports 1,688 different plant species alone. Romania has one of the largest areas of undisturbed forest in Europe, covering almost 27% of its territory. The country had a 2019 Forest Landscape Integrity Index mean score of 5.95/10, ranking it 90th globally out of 172 countries. Some 3,700 plant species have been identified in the country, from which to date 23 have been declared natural monuments, 74 extinct, 39 endangered, 171 vulnerable, and 1,253 rare. The fauna of