Our total public debt is at $11,927,435,900,948.90 as of October 6, 2009, and our most recent annualized GDP number was 14.152 trillion dollars, so that ratio is already 84% today.
Worse, the total public debt has shot up an incredible $1,300,558,852,035.82 in the 9 months since the Kenyan Clown's inauguration --- and almost all of that increase has been in the debt held by the public (intragovernmental holdings have "only" grown by $100 billion.) At that pace, and assuming that GDP continues its current movements (edging down, for the most part), then the total public debt will be larger than the GDP before the end of 2011.