Ranking countries by their government debt to GDP

The United States is hardly the only rich country struggling with high government debts. Here's a ranking of wealthy countries by central government debt as a percentage of gross domestic product. GDP is the broadest measure of economic activity.
These are figures provided by the World Bank from 2010, the most recent year for which data is available. The percentages have likely increased since then for most countries. But the rankings likely haven't changed much.
Country Central government debt/GDP
Japan 175.0%
Greece 131.5%
Italy 117.3%
Portugal 94.5%
France 88.4%
Britain 82.8%
United States 76.8%
Germany 56.1%
Canada 52.6%
Spain 48.3%
Australia 29.5%