Mobile email audience in U.S. grows by nearly 20 Million in 2011

2011 has been a fine year on the mobile devices front. The mobile email audience has grown by almost 20 million users during the three-month average period ending November 2011, notes comScore. The main takeaway of the report is that 2 out of 5 mobile users in the U.S. used email, and a whopping 78% of smartphone owners use email on a regular basis.
Both frequency and total usage has been increasing, as the following graphic shows:
 


The portion of mobile email users accessing email almost every day represents 64%: quite a big chunk of the total number of mobile email users, which is now at nearly 90 million users. The aforementioned growth of nearly 20 million is a jump of 28%.
Just for checks, the comScore post of almost a year ago indeed noted 70 million users in the 3 month period ending November 2010. Growth is down from 36% to 28% in the past period, but still quite significant.