What percentage of African Americans voted for Obama?

I saw plenty of statistics on TV the other night about percentages of white christians, or jewish, or hispanics who voted for Obama, but there was nothing posted about the African American vote. I've searched everywhere trying to find this statistic, but with no luck. Does anyone know this and have a source?
Update: I am well aware that most probably did vote for him, but I would like some more concrete figures.

Oh, and this is not to be confused with "what percent of voters were African American". I am asking what percent of the African Americans who did vote, voted for Obama.

Thanks.
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