Does Paul Wolfowitz Not Know How Many American Soldiers Have Died in Iraq?

"It's approximately 500, of which - I can get the exact numbers - approximately 350 are combat deaths."
--Deputy Defense Secretary Paul Wolfowitz, asked about American casualties at a hearing of a House Appropriations subcommittee in April.

A question in light of Memorial Day: which is more likely, that Wolfowitz didn't know how many Americans had died in Iraq, or simply didn't care?