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399140 01: Sandwiches are priced in euros in a cafe window January 2, 2002 in Venice, Italy. The euro became the official currency of 12 European nations January 1, 2002. (Photo By Justin Sullivan/Getty Images)

399140 01: Sandwiches are priced in euros in a cafe window January 2, 2002 in Venice, Italy. The euro became the official currency of 12 European nations January 1, 2002. (Photo By Justin Sullivan/Getty Images)