George Weigel: Christianity, by the numbers

For 20 years, David Barrett's "Annual Statistical Table on Global Mission" (available in the quarterly International Bulletin of Missionary Research) has offered a numerical cornucopia to anyone interested in pondering the state of Christianity, and indeed of religious belief, throughout the world. Even for the statistically-challenged (like me), two large conclusions jump out from Dr. Barrett's 2005 table.

Interesting observations are made here.