Economic history of Spain the European community ever since. The country was a leading proponent of the EU single currency, the euro, long before it had been put into circulation. Together with the other founding euro members, it adopted the new physical currency on January 1, 2002. On that date Spain terminated its historic peseta currency and replaced it with the euro, which has become its national currency shared the rest of the Eurozone. This culminated a fast process of economic modernization even though the strength of the euro since its adoption has raised concerns regarding the fact that Spanish exports outside the European
Reserve currency before the beginning of the worldwide credit crunch related recession and Eurozone crisis, which harmed the euro and slowed its adoption. Since 2009, the reserve currency use of the euro has continued to drop, down to 23.9 percent in 2013. The Dutch guilder was the "de facto" reserve currency in Europe in 17th and 18th centuries. The United Kingdom's pound sterling was the primary reserve currency of much of the world in the 19th century and first half of the 20th century. The emergence of the USA as an economic superpower, and the establishment of the U.S. Federal Reserve System