As I said earlier, worldwide data was taken from VGchartz (hence the warning that it was a very rough estimate). I did so because reliable sources only cover a few markets and ignore others entirely. So as I said, they were just estimates :) VGC's normal margin of error could explain the difference though (as I noted).
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As I said earlier, worldwide data was taken from VGchartz (hence the warning that it was a very rough estimate). I did so because reliable sources only cover a few markets and ignore others entirely. So as I said, they were just estimates :) VGC's normal margin of error could explain the difference though (as I noted).