"In the whole of India the proportion of Hindus to the total population has fallen in 30 years from 74 to 69 percent, but this is partly due to the inclusion at each succeeding Census of new areas in which Hindus, if they are found at all, are a minority. Bengal contributes 24 millions or 36 per cent to the total number of Muhammadans in India. They are found chiefly in the Eastern and Northern Districts. In this tract there was a vigorious and highly successful propaganda in the days of the Pathan Kings of Bengal. The inhabitants had never been fully Hinduised, and at the time of the first Muhamadan invasions most of them probably professed a debased form of Buddhism. They were spurned by the high class Hindus as unclean and so listened readily to the preachings of the Mullahs who proclaimed that all men are equal in the sight of Allah, backed as it often was by a varying amount of compulsion. "Another less notable exception is found in Malabar, where the Mappillas are the descendants of local converts, the earliest of whom were made by the Arabs who began to frequent the coast in the 8th century. A certain number of new converts are still being made." "It should be added that even in Northern India the Muhammadan population is by no means wholly of foreign origin. Of the 12 million followers of Islam in the Punjab, 10 millions showed by the caste entry (such as Rajputs, Jat, Arain, Gujar, Mochi, Turkhan, and Teli) that they were originally Hindus. The number who described themselves as belonging to foreign races such as Pathan, Biloch, Sheikh, Saiyad and Moghal was less than 2 millions, and some even of these have very little foreign blood in their veins.” "The number of Muhammadans has risen during the decade by 6.7% as compared with only 5% in the case of Hindus. There is a small but continuous accession of converts from Hinduism and other religions, but the main reason for the relatively more rapid growth of the followers of the Prophet is that they are more prolific. This may possibly be due to their more nourishing dietery, but the main reason is that their social customs are more favour able to a high birth rate them those of The Hindus. They have fewer marriage restrictions, early marriage is uncommon and widows remarry more freely. "The greater reproductive capacity of the Muhammadans is shown by the fact that the proportion of married females to the total number of females aged 15- 40 exceeds corresponding proportion for Hindus. The result is that Muhammadans have 37 childrens aged 0—5 to every person aged 15—40 while the Hindus have only 33. Since 1881 the number of Muhammadans in the areas then enumerated has risen by 26.4 per cent while the corresponding increase for Hindus is only 15. 1 per cent." Writing on the comparative increase of the two communities in Burmah the census report proceeds in para 173:— "We have seen that in Burmah the Hindu settlers have a tendency to become absorbed in the Buddhist population around them, but this is not so with the Muhammadans. There are scattered communities of Muhammadans who have been settled in Burmah for several generations and still retain their faith unimpaired. When a Muhammadan marries a Burmese wife he brings up his children in his own religion. The offsprings of these mixed marriages are known as Zerbadis."
January 1, 1970
https://en.wikiquote.org/wiki/Demographics_of_India