Analysis of information sources in references of the Wikipedia article "Ευρώ" in Greek language version.
The NCBs' shares in this capital are calculated using a key which reflects the respective country's share in the total population and gross domestic product of the EU – in equal weightings. The ECB adjusts the shares every five years and whenever a new country joins the EU. The adjustment is done on the basis of data provided by the European Commission.
The euro is the single currency of the member states that have adopted it. Το make this singleness apparent, Community law requires a single spelling of the word euro in the nominative singular case in all community and national legislative provisions, taking into account the existence of different alphabets.
Since 1 January 2002, the NCBs and the ECB have issued euro banknotes on a joint basis.