Radio advertising revenues in the US grew 2% in 2004 to $21.4 billion (€16.4bn, £11.3bn), despite a dip at the end of the year.

The Radio Advertising Bureau's latest figures were boosted by local ad spend which grew 3%, in contrast to national advertising which showed no increase for the period.

Says RAB president and ceo Gary Fries: "Radio continues to be attractive to advertisers because it continues to grow its audience and deliver consumers."

He adds that the number of listeners to terrestrial radio grew by more than 3.5 million in the past year, bringing the total number to 10.7 million.

Data sourced from New York Times; additional content by WARC staff