This is a better site:
http://www.treasurydirect.gov/NP/BPDLogin?application=np
You get to see how the debt grew over the years by doing a search for specific dates.
Feb 1, 1993 - Jan 31, 2001:
from $ 4,176,491,860,224.29 to $ 5,740,291,126,546.45
an overall gain of $ 1,563,799,266,322.16 after these 8 years have passed.
You can actually see it go down over time and then slide back up if you view it as a daily trend. It's fascinating.
... more...
Feb 1, 2001 - January 31, 2009:
from $ 5,703,346,472,448.65 to $ 10,632,005,246,736.97
an overall gain of $ 4,928,658,774,288.32
January 20, 2009 - today:
from $ 10,632,005,246,736.97 to $ 12,880,364,008,405.96
an overall gain of $ 2,248,358,761,668.99