So jake, you accuse me of playing with numbers, and then respond by playing with numbers. Gosh, its almost like politics!
If you consider global population growth from year 1 to today, it indicates a population growth of about 2,000%. If you then consider that say, less than half a percent of the population in the years 1 � 30 AD were Christian, and the global population is now 33% Christian, that�s a circa 2000 year growth of about 136,000%.
If it was population of 1.6bn x 34% in 1900, that�s about half a billion Christians.
If it is population of 6.5bn x 33% in 2008, that�s about 2.1bn Christians.
To me, that still indicates growth overall since you have an extra 1,6bn Christians, its just that the population growth rate (PGR) over that time has predominantly occurred in non-Christian countries.