Unbelievable

No, wait.  It's believable.  In fact, it was easily predictable.  Which doesn't make it any less astounding:

The increase in incomes of the top 1 percent of Americans from 2003 to 2005 exceeded the total income of the poorest 20 percent of Americans, data in a new report by the Congressional Budget Office shows.

The poorest fifth of households had total income of $383.4 billion in 2005, while just the increase in income for the top 1 percent came to $524.8 billion, a figure 37 percent higher.