Map shows the % Muslim population in each nation, worldwide.
There are alternate versions of this map available on wikimedia commons. Some use older data and provide a historical map. Some are current, but the above map differs in setting the lower limit of the lightest band to 1%.
Gray color for a nation means near zero % of the population in that nation is Muslim. Numbers have been rounded to nearest integer for coloring purposes.
Source: Pew Research Center, Washington DC, Religious Composition by Country (December 2012)
Accessed on: June 2014
For absolute numbers, instead of % population, see: http://www.pewforum.org/2012/12/18/table-religious-composition-by-country-in-numbers/

This is a derivative work on BlankMap-World6.svg available on wikimedia commons. It has been tested with W3C.
Own work
M Tracy Hunter