The euro is the currency of twelve European Union member states. It was established in 1992 by the Maastricht Treaty to create an economic and monetary union. The euro is administered by the European System of Central Banks and used initially by Austria, Belgium, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Netherlands, Portugal and Spain at fixed conversion rates. Adopting the euro has eliminated exchange rate fluctuations and reduced transaction costs between member states while expanding their financial and labor markets.