US advertising spend is growing - albeit not at the predicted pace.

Latest figures from researchers TNS Media Intelligence show adspend grew 5.2% to $34.9 billion (€27.29bn; £18.71bn) in the first quarter of this year, compared with a 4.4% rise in the year-earlier period.

However, TNS says the Q1 rise is lower then its predicted 5.5%, partly due to a fall in adspend by automakers - both domestic (-11%) and overseas (-2.6%).

Internet display advertising claimed the biggest growth, up 19.4% in Q1. The Winter Olympics helped to increase spending on network TV by 12.3%. Local newspaper adspend was down 6.1%, while national spot radio fell 0.2%.

Data sourced from Wall Street Journal Online; additional content by WARC staff