Polly said:
Oh boy, just when I thought I could bluff my way through without attracting any attention...

. 230% is a mental note I had of the situation made earlier on. As I have lost track of the supporting evidence now so I went off digging other sources. According to http://mwhodges.home.att.net/nat-debt/debt-nat.htm" , the TOTAL US debt stood at 40 TRILLION last year, that's 347% of this year's GDP or annual revenue in my example.
Oh come on, Polly, you should know that the total debt doesn't mean a whole lot by itself. The number from the CBO is the public debt, money that the government itself owes, whereas your number (I'm sure know, but to clarify for anyone that does not) is the total debt of all businesses, all households, and the government combined. The problem with using this number as a doomsday prediction is that most of this debt is simply going around in circles. Households owe money to businesses, which in turn owe money to individuals (venture capitalists), other businesses (banks), and the government (fed banks and bonds). The government itself owes a lot of its money to individuals (bonds) and to businesses (private banks). If we're simply going to take the total debt, then we need to distinguish between money the US as whole owes to itself, and money it owes to others (minus what those others owe the US) to get an accurate picture of how much of a problem this actually is.
Just with respect to individual debt, consider the inflation of that number due to people owing mortgage payments. My parents, for instance, still owe well over $100K, which is well in excess of the household income, but that is owed over the course of the next fifteen years, and the number is far
less than the income for the household projected over those fifteen years.
You'll notice http://www.publicdebt.treas.gov/opd/opdpdodt.htm that, even in the case of the public debt, half of it is simply one government agency being in debt to another.
Unfortunately, I cannot find anything on the
total debt of all countries, but I did find
this, which indicates Indonesia as being the only country whose
external debt was in excess of its GNP, as of 1999. I haven't been able to find a more current version of this.