Almost every country in the world has sovereign debt – in fact, some of the world’s most powerful economies have a lot of it. Yet while it’s perfectly healthy to accrue debt to finance growth, some countries are bearing a serious burden. Using the World Economic Forum's debt-to-GDP ratio for 2017 (the latest year for which figures are available), here are the countries with the highest debt-to-GDP ratios in the world. We haven't included countries with economies smaller than $10 billion GDP.