Australia property bust looming, page-66

Total Australian household debt: $1.8 trillion
Total Australian household net worth: $9.4 trillion
In percentage terms we're looking at 19.1%

Total American household debt: $12.6 trillion
Total American Household net worth: $88.1 trillion
In percentage terms we're looking at 14.3%

They still managed a significant financial crisis that sunk multiple banks. US debt levels at the moment are within range of 2008 levels, which is why I used current figures.