After Bulgaria, euro expansion faces hurdles in remaining EU states

Bulgaria became the 21st member of the euro zone on Thursday despite opposition from half its electorate, leaving only a handful of countries in the 27-member European Union yet to adopt the currency.

Although public support for the euro is high in some of the remaining countries including Hungary, eurosceptic parties in governing coalitions and parliaments are likely to hold back further expansion of the currency zone for the foreseeable future.

Here are the remaining countries.