Doubt it will go that high, its already way past the unsustainable point as is. Also seriously doubt whether most of that debt will ever be paid back. The central banks bargain on the economy growing itself out of the debt but cannot see that happening. Not sure how they are going to get it sorted out, all I know is that something big is on its way and it ain't going to be a picnic.

Also, don't forget about Europe, Draghi is trying his level best to catch up on his own chart, don't like being left behind.