Since early last year, global investors have followed every twist and turn in the ongoing debt crisis engulfing the euro zone.
As the threat looms that more of the so-called "periphery" countries are forced to accept bailouts from the European Union and the International Monetary Fund, investors' attention is sharpening even more on the euro zone than it was already.
Click ahead to see what countries have the most indebted governments, and how learn their economies are faring. The figures represent debt as defined by the Maastricht Treaty: consolidated general government gross debt at nominal value, outstanding at the end of the year. These numbers, the most recent available, are from year-end 2009.