In 2001, Greece entered the European Monetary Union, swapped the drachma for the euro, and acquired for its debt an implicit European (read German) guarantee. Greeks could now borrow long-term funds at roughly the same rate as Germans—not 18 percent but 5 percent. To remain in the euro zone, they were meant, in theory, to maintain budget deficits below 3 percent of GDP; in practice, all they had to do was cook the books to show that they were hitting the targets.