The source
The August 2006 Report to Congress
--The statistics were never "secret." This is a Woodward lie.
--The attacks enumerated by Woodward were not all attacks on U.S. troops, which are in fact going down. This is also a Woodward lie.
Wouldn't kill you to read the rest of it either. Of course, you can also say that this source has no credibility either, so we're back to square one.
I notice you seem to have no problem with Woodward's credibility. Do your own research on him if you don't trust mine.