07/05/2008 05:12 am ET | Updated May 25, 2011

David Letterman Posts Worst Ratings Since 1993

NEW YORK -- CBS' "The Late Show With David Letterman" tied its lowest-ever adults 18-49 rating last week.

"Late Show" averaged a 0.9 rating in adults 18-49, Nielsen Media Research said. That is its lowest ever for an original since the program premiered in 1993, though not the lowest for the show: It has hit 0.9 several times, most recently in late December when it was in reruns because of the WGA strike.

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