Even though we’re actually looking at 12.8 million (77.8%) SIMs being effectively in use, it’s still a staggering figure.
Note the variations between providers in the article - they’re consistent with what I’ve gleaned from my acquaintances over the past year or so, and speak of changing consumer habits - IM taking over SMS, cheaper voice calls boosting use, and, overall, a big (30%) increase in data usage.