Display Advertising Click Through Rates by Ad Unit:

Digital advertising accounted for 19.8% of worldwide total media advertising spending
in 2012, according to eMarketer, and will account for 21.7% of it in 2013. By 2016, they
expect digital to account for more than a quarter of all media ad spending worldwide.
This DG MediaMind Full-Year 2012 Benchmark Report has been developed by Media Mind

This Benchmark  Display Advertising  CTR by Ad Units by features analysis of more than
600 billion display ad impressions from 47 countries worldwide dating from January 1,
2012 to December1, 2012,