the establishment of a new country, which led to the Ten-Day War. On 7 July, the Brijuni Agreement was signed, implementing a truce and a three-month halt of the enforcement of Slovenia's independence. At the end of the month, the last soldiers of the Yugoslav Army left Slovenia. In December 1991, a new constitution was adopted, followed in 1992 by the laws on denationalisation and privatization. The members of the European Union recognised Slovenia as an independent state on 15 January 1992, and the United Nations accepted it as a member on 22 May 1992. Slovenia joined the European Union on 1 May 2004. Slovenia has one Commissioner in the European Commission, and seven Slovene parliamentarians were elected to the European Parliament at elections on 13 June 2004. In 2004 Slovenia also joined NATO. Slovenia subsequently succeeded in meeting the Maastricht criteria and joined the Eurozone (the first transition country to do so) on 1 January 2007. It was the first post-Communist country to hold the Presidency of the Council of the European Union, for the first six months of 2008. On 21 July 2010, it became a member of the OECD. The disillusionment with domestic socio-economic elites at municipal and national levels was expressed at the 2012–2013 Slovenian protests on a wider scale than in the smaller 15 October 2011 protests. In relation to the leading politicians' response to allegations made by the official Commission for the Prevention of Corruption of the Republic of Slovenia, legal experts expressed the need for changes in the system that would limit political arbitrariness. Geography Slovenia is situated in Central Europe touching the Alps and bordering the Mediterranean Sea. At the regional conference in Prague in 1994, the International Geographical Union ranked Slovenia among the nine Central European countries, including Germany, Poland, the Czech Republic, Slovakia, Hungary, Switzerland, Liechtenstein and Austria. It lies between latitudes 45° and 47° N, and longitudes 13° and 17° E. The 15th meridian east almost corresponds to the middle line of the country in the direction west–east. The Geometric Centre of the Republic of Slovenia is located at coordinates 46°07'11.8" N and 14°48'55.2" E. It lies in Slivna in the Municipality of Litija. Slovenia's highest peak is Triglav (); the country's average height above sea level is . Four major European geographic regions meet in Slovenia: the Alps, the Dinarides, the Pannonian Plain, and the Mediterranean Sea. Although