Christians number 2.2 Billion worldwide (all Catholic, Protestant, etc.,) within 6,876 total people groups compromising 28.6% of the world population.
Evangelical Christians total 550 million (Operation World 2015).
Evangelicals have grown from only 3 million in AD 1500, to 550 million worldwide, with 54% being Non-Whites.
In ministries, there are 4.19 million full-time Christian workers and 95% are working within the Christian world. [original source, Frontier Harvest Ministries, 2007]
There are 900 churches for every one unreached people group. (USCWM, Mission Frontiers, 2001)
There are 78,000 Evangelical Christians for every one unreached people group.