According to him, Christians amount to about 26 per cent of mankind, Hindus to about 13, Mohammedans to about 12 1_2, Buddhists to about 40, and Jews to about 1_2.
In regard to all these estimates, it will be observed that the immense numbers assigned to Buddhism are made out by the multitude of Chinese with which it is credited.

Subtract Cunningham's 170 millions of Chinese from his total of 222, and there remains only 52 millions of Buddhists.

Subtract Davids' (say) 414 1_2 millions of Chinese from his total of 500, and there remain only 85 1_2 millions for Buddhism.

Of the numbers assigned to other countries, as well as of their whole populations, I am in considerable doubt, excepting in the cases of Ceylon and India; but the greatness of the estimates turns upon the immense multitudes said to be in China.

I do not know what total population Cunningham allowed for that country, nor on what principal he allotted 170 millions of it to Buddhism;--perhaps he halved his estimate of the whole, whereas Berghaus and Davids allotted to it the highest estimates that have been given of the people.
But we have no certain information of the population of China.