to have bit better data, you'd probably have to take longer timespan and divide it by country's population using computers (or at least by population) (results would be REALLY interesting to see)
It's be cool to plot countries over time. I think dividing it by the country's computer-using population is not helpful because this is already the number of client downloads and we probably only care about that magnitude (unless you want to know per-capita bitcoin users for trivia).