The Netherlands is a representative parliamentary democracy organised as a unitary state. Its administration consists of the Monarch and the Council of Ministers, which is headed by a Prime Minister (currently Mark Rutte). The people are represented by the States General of the Netherlands, which consists of a House of Representatives and a Senate. The Netherlands is divided into 12 provinces: Drenthe, Flevoland, Friesland, Gelderland, Groningen, Limburg, North Brabant, North Holland, Overijssel, South Holland, Utrecht and Zeeland. The provinces are divided into municipalities. The Netherlands has the euro as its currency, except in the special municipalities of the Caribbean Netherlands (BES islands), where the Netherlands Antillean guilder was replaced by the U.S. dollar in 2011.