Found on eMarketer.
My guess is mobile usage in is a big reason behind China, Japan & Korea's lead. Increased access will obviously lead to increase use.
What do you think is the % that we will tap-out at? Will human nature allow us to spend more than 60% online, 70%? And how long until we begin to revolt OR until the internet allows us to find the information, entertainment or complete our tasks at a faster rate leading to a decline?