A few days back, I saw Hans Rosling visualize HIV data in this presentation at TED talks. I was looking for (to purchase or create) such a graphing tool for quite some time (incidentally, my requirement is a combo of heat map, bar/pie chart & motion chart). A little research revealed that Google purchased Trendalyzer, the graphing tool used in this presentation, from his company Gapminder in March 2006. A version of it has been integrated into Google Spreasheets as Motion Chart.
Luckily, I found some Indian Mobile-GSM subscriber data during the same time, cleaned it a bit, added some data and here's how the trend looks...
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