There are a lot of interesting facts from the 62-page study. One example is that Russia has more Muslims than Jordon and Libya combined. Another is that the Pew Forum estimates the United States Muslim population to be only 2.5 million. That's 4.5 million less than President Obama stated in his speech to the Muslim world at Cairo University this past June.
It will also be interesting to see the study they publish next year that will estimate growth rates of Muslims worldwide.