Serge Christian Pierre Belamant
Analyst · Baird
Yes, it's Serge. Well, firstly, it's a little tricky to answer -- to give you such a number, and the reason being that under our mobile offering, there are a multitude of different products that we are actually selling. And each one of these product, by definition, has got a different economic association with it. You will know from a worldwide point of view that whenever you're selling, for example, an airtime voucher, we would be getting a certain percentage discount on that particular voucher. Some of the discount we may or may not pass on to our consumers themselves, in other words, we might want to give a bit of a kickback to our own -- specifically our more vulnerable people in South Africa. But that means the margins are very, very low. When it comes, of course, to something like electricity, as an example, the margins are even lower, but the product is even more important for the poorest of the poor. When it comes to more banking products, then obviously your margins can be substantially higher while they remain very much lower than a standard banking product. And then of course, there are many other things that I've mentioned before. There are some products that we offer completely for free. For example, the emergency access to, for example, an ambulance service. And that wouldn't charge a fee at all. So it's actually a cost against our margins. But there are other products that we are now currently selling, for example, our latest solar panel-driven lamp, which really might be a one-off in terms of the fact that somebody buys it and we might make a small margin, which could be 10%, 15% of the value. But more importantly, that has got an embedded sim, for lack of a better word, that allows us to build the VoIP network as we deploy more and more lamps in more and more households. So certainly, our revenue there doesn't come from the lamps. It comes from the fact that we're providing a voice and data network utilizing a solar lamp as a cell phone charger and as, for lack of a better word, a WiFi hub. So it's very difficult unfortunately right now to give you a number to say, well, if you could only think to the part, this is the solar margin that you can come out with. So sorry not to be able to be more specific in that at this point in time.
David J. Koning - Robert W. Baird & Co. Incorporated, Research Division: Got you. Maybe just from really a high level, though. Can your overall transaction segment maintain -- I know 40% would be probably hard to maintain. That's kind of where you've been lately. But I mean, is this going to be a well over 10% growth segment for a while now but at the same time maybe margins stripped a little lower as that part gets bigger?