For years, the decline in broadcast audiences has been sort of a mild, persistent headache for TV executives. U.S. viewership of “linear television” has been dipping at a speed of few percentage points per year: In some quarters, the drop stabilized for a spell while in others, it briefly expanded to 4% or 6%. But the Nielsen numbers from the second half of 2014 are the worst on record for a six-month period because U.S. television audience decline accelerated by a scary 7% in Q4 2014.
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