Ratio of Adventists to Non-Adventists, 10/40 Window*
The 10/40 window refers to regions of the Eastern and Western Hemispheres between 10 and 40 degrees north of the equator. Roughly two thirds of the world population lives here, and most of them practice Islam, Hinduism, Buddhism, animism, or atheism. Many governments formally or informally oppose Christian work of any kind within their borders.
*As of December 2012 Source: General Conference Office of Archives, Statistics, and Research