Germany.
Germany has a social market economy. Germany founded the European Union, as well as the Eurozone. Its official currency is the Euro.
The euro is sometimes though of as the single currency of the European Union, and is denoted by the symbol "€." However, the European Union has 27 countries, of which only 17 use the Euro. The other 10 countries still use their own currencies. The 17 countries are referred to as the Eurozone. So it is more accurate to say that the euro is the single currency of the Eurozone, not the European Union.
The Netherlands, along with other 17 countries, belongs to what's known as the 'Eurozone', and because of that, since the year 2002, its official currency is the Euro.
12 currencies are used in the European Union. 17 countries use the Euro and the other 11 countries each use their own currency. In January 2014 18 will use the Euro and 10 will have their own currencies, so then there will be just 11 currencies.
Capitalism
The Eurozone was created to make trades easier among Eurozone members and to give Eurozone nations an advantage while trading with other countries.
The official currency of Eurozone is the Euro.
Belgium belongs to the eurozone. Scroll down to related links and look at "Eurozone - Wikipedia".
27
Unknown
Yes.
Euro zone
Germany.
Yes it is since January 2008
The Eurozone
To join the Eurozone, their economies need to meet certain criteria, so not all countries are in the Eurozone.