Belgium, Germany, Greece, Spain, France, Ireland, Italy, Luxembourg, the Netherlands, Portugal, Austria and Finland adopted the [euro] in 2002.
This is not true. The euro became the currency of those countries when the irrevocable exchange rate came into effect on 1 January 1999. After that the precise exchange rates to six digits were known and the euro could be used for paper and electronic operations. The existing peseta, franc, Mark etc. notes and coins merely represented a certain value in euros. On 1 January 2002 the new physical currency began circulating but the euro had already been in existence as the currency of those countries for three years.