North American Email Marketing Metrics, Q4 2011 & Q4 2012 [TABLE]
Overall, unique open rates increased from 14.4% in Q4 2011 to 16.3% in Q4 2012, while click-through rates, transaction rates, and revenue per email all held relatively steady. The dollar value of the average order increased from $160.99 to $180.25. Read the rest at eMarketer.